See also

Thomas Lancaster's parents: Henry Lancaster - King Henry IV (Bolingbroke) (1367-1413) and Mary de Bohun - Queen of Henry IV ( -1394)
Thomas Lancaster's siblings: Henry Lancaster - King Henry V (1387-1422), John Lancaster of Lancaster, 1st Duke of Bedford (1389-1435), Humphrey Lancaster of Lancaster, 1st Duke of Gloucester (1390-1447), Blanche Lancaster of England (1392-1409) and Philippa Lancaster of England (1394-1430)

Thomas Lancaster of Lancaster, 1st Duke of Clarence (1387-1421)

Name:	Thomas Lancaster of Lancaster, 1st Duke of Clarence
Sex:	Male
Father:	Henry Lancaster - King Henry IV (Bolingbroke) (1367-1413)
Mother:	Mary de Bohun - Queen of Henry IV ( -1394)

Individual Events and Attributes

Birth	1387¹
Death	1421 (age 33-34)¹

Sources

1	"Wikipedia" (en.wikipedia.org). https://en.wikipedia.org/wiki/Henry_IV_of_England.