Wikidata:Database reports/identical birth and death dates/1

These are pairs of items with identical dates in date of birth (P569) and date of death (P570). Some should be merged (duplicates), others not: different persons with the same dates (coincidence or virtual twins) or incorrect dates (mixup).

The list is updated regularly (daily?) by bot (items with corrected or removed dates can take a few days to be removed from the list).

• A formatted version is at selection (1)
• Different people with identical dates are listed at false positives. A list of "virtual twins" was developed from that.
• For a status, see Wikidata talk:Database reports/identical birth and death dates

How probable are false positives?

• (A) Items for people with both dates: 3,021,940 ^ref
• (B) Items for people with two people with the same date of birth and date of death (Q20978290): 3,202 ^ref
• Ratio (B/A): 1.06 ‰
• (C) There are 303,142 ^ref redirects to items with both dates, i.e. two items were merged
• Ratio (C/A): 10.03 %
• False positives (B/C): 1.06 % (This underestimates it as it assumes that all items had both dates before being merged).

Items in the list below could be:

Type	Sample	Suggested approach
Items about the same person	John Casimir, Count of Erbach-Breuberg (Q19902526) sitelink to enwiki Johan Casimir van Erbach (Q3917172) sitelink to nlwiki	merge the two items
Items about the same person	Henri Verdun (Q3132140) sitelink to frwiki Maurice Castellain (Q5604715) sitelink to svwiki	merge the two items
Items about the same person	Charles Henry of Nassau-Siegen (Q64055) sitelink to enwiki redirect Charles Henry of Nassau-Siegen (Q16858083) sitelink to enwiki article	delete the redirect-sitelink and merge the two items. Special:MergeItems can sometimes merge them directly.
Items about the same person	Karl Gottlieb von Windisch (Q927307) items with sitelinks Karl Gottlieb von Windisch (Q1465093) sitelink manually moved, but item not redirect	merge the two items
Items about the same person	Peter Lamberg (Q5932605) sitelink to svwiki (disambiguation page) Peter Lamberg (Q19976026) sitelink to svwiki article	delete the sitelink to the disambiguation page and merge the two items (sitelink didn't get updated on pagemove) find a new item for the disambiguation page or create it
Items about likely about the same person, but this isn't conclusive	Paul Hofmann (Q90030) and Paul Gutike (Q55681910) Eyre Turquand (Q65807514) and Ellen Eyre Turquand (Q72890320)	add said to be the same as (P460) to each, do not merge them
Items about different people, with incorrect dates and possibly mixed-up sitelinks	Yrjö Saarinen (Q11903052) and Yrjö R. Saarinen (Q11903045) Aleksander Thomson (Q3742060) and Aleksander Thomson (Q16406815)	correct dates and/or fix sitelinks. Don't merge. If in doubt, use the articles' talk pages or WD:IWC
Items about a person and items with dates they shouldn't have	Sigmund Freud (Q9215) Biography of Sigmund Freud (Q2904119)	remove dates from the item that shouldn't have them
Items for identical persons, but with two articles at the same Wikipedia	Olavi Merinen (Q11885292) with article at fiwiki Olavi Merinen (Q17382548) with another article at fiwiki	possibly suggest to Wikipedia to merge both adding Template:Merge (Q6919004) to each article mark one with instance of (P31): Wikimedia duplicated page (Q17362920) and qualifier of (P642) linking to the other item Alternatively, interlink both with said to be the same as (P460) possibly move statements to the one item that isn't marked with Wikimedia duplicated page (Q17362920) Once the merge of the articles completed, the items can be merged
False positives: two different persons, with same dates of birth and death	Étienne Bernand (Q7121177) and André Bernand (Q19953021) Harry Elkins Widener (Q511212) and Juozas Montvila (Q4301999) Robun Kanagaki (Q1723541) and James MacGregor (Q6138639)	double-check dates, ideally with references interlink both items with different from (P1889) and qualify with criterion used (P1013) = two people with the same date of birth and date of death (Q20978290) add items to False_positives
Already merged/fixed	some of the below (items redirected, labels and statements appear then as identical)	do nothing ;)

Steps:

• Are both items about the same person?
  • If yes:
    • Can the items be merged?
      • If yes: merge them. In the next update, the pair will disappear from the list
      • If no: tag the two articles at Wikipedia for merging. In the next update, the pair will be moved to the "marked for merging" section of the main list.
  • If no:
    • Are the instance of (P31) values correct?
      • If no: correct them
    • Should the item have date of birth (P569)/date of death (P570)?
      • If no: remove them. In one of the next updates, the pair will disappear from the list.
    • Are the dates correct?
      • If no: correct them. In one of the next updates, the pair will disappear from the list.
      • If yes: add the pair to "false positives". In the next update, the pair will disappear from the list.

Update frequency:

• Removal of merged items: generally daily
• Removal of items marked as different: generally daily
• Removal of items with corrected dates: generally weekly (based on Wikidata dumps)
• Merge of items identified as duplicates and marked for merging at a Wikipedia (if they still include identical dates): occasionally by bot once the merger at Wikipedia is completed.
• Addition of newly identified items: generally weekly (based on Wikidata dumps)

Tools:

• Note Markasduplicate

DOB	DOD	Merged	Person 1	Person 2	P31 (#1)	P31 (#2)	P21 (#1)	P21 (#2)	P27 (#1)	P27 (#2)	P106 (#1)	P106 (#2)	Diff from	TO DO
25 December 1861 25 December 1861	12 November 1946 12 November 1946		Madan Mohan Malaviya	Mahamana Malaviya	human	human, Wikimedia duplicated page	male		British Raj		lawyer, philosopher, journalist, poet, politician, revolutionary, freedom fighter	academician, journalist, politician, lawyer, official, poet	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
7 October 1853 4 November 1868	30 May 1917 20 March 1939		František Jaroslav Rypáček	Karel Ryska	human	human	male	male	Austria-Hungary		pedagogue, writer, poet, teacher, historian, literary historian, local historian, high school teacher, editing staff	technician	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
28 March 1887	17 November 1940 17 November 1940		Jamaluddin	Muhammad Kasyful Anwar	human	human	male	male	Indonesia	Indonesia	'ālim	'ālim	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
20 July 1893 20 July 1893	13 October 1955 13 October 1955		Eusebio Fernández Muñiz	Facundo Pascual Quilis	human	human	male	male	Spain		businessperson, sports executive		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
9 June 1898 9 June 1898	4 February 1945 4 February 1945		Anton Pulanich	no label	human	human	male	male				military personnel	Stefan Jurech -	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
30 December 1909 30 December 1909	18 June 1979 18 June 1979		no label	no label	human	human	male	male	Egypt	Khedivate of Egypt, Sultanate of Egypt, Kingdom of Egypt, Republic of Egypt, United Arab Republic, Egypt		radio personality, teacher	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
30 June 1911 22 January 1939	14 August 2004		Czesław Miłosz	Stanisław Kwiatkowski	human	human	male	male	Poland, United States of America, Lithuania	Poland	poet, diplomat, writer, essayist, translator, pedagogue, university teacher, literary historian	sociologist, political scientist, soldier	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
30 June 1911 1929	14 August 2004 20 January 2022		Czesław Miłosz	Jerzy Waglewski	human	human	male	male	Poland, United States of America, Lithuania		poet, diplomat, writer, essayist, translator, pedagogue, university teacher, literary historian		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
22 January 1939 1929	20 January 2022		Stanisław Kwiatkowski	Jerzy Waglewski	human	human	male	male	Poland		sociologist, political scientist, soldier		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
14 May 1952, 16 May 1952 16 May 1952	1 January 2020 1 January 2020		Shinji Katsura	Katsura Shinnosuke	human	human	male	male	Japan	Japan	rakugoka	rakugoka	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
9 January 1691 9 January 1691	17 August 1748 17 August 1748		Per Ridderström	Per Ridderström	human	human	male	male	Sweden	Sweden	military personnel	military personnel	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
19 August 1755	1 August 1824		Christiaan van Geelen	Geelen, Christian van, the Elder	human	encyclopedia article	male		Kingdom of the Netherlands		painter, drawer		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
27 October 1807 27 October 1807	1 May 1886 1 May 1886		Charles Lemettre	Amelie Lambelin	human	human	male	female			cooper		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
19 November 1831 19 November 1831	19 September 1881 19 September 1881		James A. Garfield	Aboud bin Lādin	human	human	male	male	United States of America		politician, military officer, lawyer, statesperson, writer		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
21 July 1853 21 July 1853, 1853	1 February 1902 1 February 1902, 1902		Ludvig Kabell	Ludwig Kabell	human	human	male		Denmark		painter, landscape painter		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
20 July 1875 20 July 1875	1932, 13 March 1932 13 March 1932		Antonin Schlesinger	Hans Schlesinger	human	human	male	male			Catholic priest	painter	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
13 March 1890 13 March 1890	14 September 1951 14 September 1951		Fritz Busch	Hans Busch	human	human	male	male	Germany		conductor, pianist, music director	director	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
18 September 1890 18 September 1890	24 June 1958 24 June 1958		Julian Stemporowski	Stepan Soroka	human	human	male	male			farmer	farmer	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
9 July 1895 9 July 1895	29 September 1915 29 September 1915		André Imhaus	Émile Georges François Imhaus	human	human	male	male	France	France			-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
9 June 1898 9 June 1898	4 February 1945 4 February 1945		no label	Stefan Jurech	human	human	male	male		Hungary, Czechoslovakia	military personnel	military officer, military personnel, military chief of staff	- Anton Pulanich	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
28 July 1902 1902, 28 July 1902	21 October 1991 1991, 21 October 1991		Grzegorz Grzeban	no label	human	human	male		Poland		chess composer, chess player, biochemist		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
5 January 1903 18 January 1903, 5 January 1903	1 May 1984 1 May 1984		Mehdi Mehdizade	Mekhti-Zade, Mekhti Mamed ogly	human	human	male				scientist		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
21 February 1903 21 February 1903	10 December 1995 10 December 1995		Jožka Králíková	Josefa Mattesová	human	human	female	female	Czechoslovakia		opera singer	librarian	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
9 March 1922 9 March 1922	28 February 2011 28 February 2011		Juliette Contandriopoulos	Sergio Manetti	human	human	female	male	France	Italy, Kingdom of Italy	botanist	architect	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
5 February 1925 5 February 1925	2 October 2015 2 October 2015		Franz zu Erbach-Erbach und von Wartenberg-Roth	Fazıl Erdoğan	human	human	male	male	Germany			applied mathematician, mechanical engineer	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
2 January 1934 2 January 1934	16 June 1971 16 June 1971		Al Torres	Alberto Torres	human	human	male	male	Mexico		professional wrestler	wrestler	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
27 April 1935	24 January 2012		Thodoros Angelopoulos	Theo Angelopoulos Film Production	human	film production company	male		Greece		film director, screenwriter, film producer, film critic, actor, journalist, director		-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2
1 January 1959 1 January 1959	27 June 2024 27 June 2024		Andreas Marianos	Andreas Marianos	human	human	male	male	Greece	Greece	actor, director, writer	actor, director, writer	-	•correct dates •merge •markasduplicate •markdifferent •MxM1 MxM2