Katherine of Lancaster was born 6 June 1372 in Hertford Castle, Hertford, Hertfordshire, England, United Kingdom to John of Gaunt, 1st Duke of Lancaster (1340-1399) and Constance of Castile (1354-1394) and died 2 June 1418 in Valladolid, Spain of unspecified causes. She married Henry III of Castile (1379-1405) September 1388 JL in Palencia, Spain. Notable ancestors include Henry II of England (1133-1189), William I of England (1027-1087), Charlemagne (747-814), Hugh Capet (c940-996), Rurik (c832-879), Alfred the Great (849-899). Ancestors are from Belgium, the United Kingdom, Spain, France, Germany, Portugal, Russia, Ukraine, Hungary, the Netherlands, Belarus, Italy, Turkey.


Offspring of Henry III of Castile and Katherine of Lancaster (1372-1418)
Name Birth Death Joined with
Mary of Castile (1401-1458) 1401 1458 Alfonso V of Aragon (1396-1458)

Katherine of Castile (1403-1439)
John II of Castile (1405-1454) 6 March 1405 20 July 1454 Maria of Aragon (1396-1445)
Isabella of Portugal (c1428-1496)

Common ancestors of Katherine of Lancaster (1372-1418) and Henry III of Castile (1379-1405)

  1. Alfonso XI of Castile (1311-1350)
  2. Charles II of Naples (1254-1309)
  3. Constança of Portugal (1290-1313)
  4. Dinis of Portugal (1261-1325)
  5. Elizabeth of Aragon (1271-1336)
  6. Ferdinand III, King of Castile (1199-1252)
  7. Fernando IV of Castile (1285-1312)
  8. Maria of Hungary (c1257-1325)
  9. María de Molina (c1264-1321)
  10. Sancho IV of Castile (1258-1295)

second cousin

Footnotes (including sources)

‡ General

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