Katherine (Roet) de Swynford is a member of the House of Lancaster.
Around 1352, Katherine de Roet went to work in Queen Phillipa of Hainaut's house. Philippa was married to English King Edward III.Like the Queen, she was from Hainaut, Low Countries, now in Belgium. She later became the governess of the children of Blanche and John of Gaunt.
C.L Kingsford was the first to propose that Katherine was born in 1350, but there is no documented evidence. She could have been born prior to this date.
(Royal Tombs of Medieval England) She was the third wife of John of Gaunt, Duke of Lancaster. Their eldest son Henry (b. 1375), was made bishop of Lincoln Cathedral - known in full as The Cathedral Church of the Blessed Virgin Mary of Lincoln or sometimes St. Mary's Cathedral - in 1398 and in the same year, his father John of Gaunt founded a chantry for Katherine and himself at Lincoln. Following the duke's death in 1399, Katherine retired to Lincoln where she died on 10 May 1403. She was buried to the south of the high altar in the Angel Choir, a position of seniority most likely secured by the involvement of her son, Bishop Henry Beaufort. The church must have had particular appeal for the duchess as it owned two relics of her name-saint: Saint Katherine's finger and the chain with which she bound the devil, as well as two giant candelabras presented by the duke. The tombs of Katherine and her daughter Joan Beaufort stand today south of the high altar with Katherine's to the west and Joan's tomb to the east.
↑ Roberts, Gary Boyd (2008). The Royal Descents of 600 Immigrants to the American Colonies or the United States. Baltimore, MD: Genealogical Publishing Co.
Roderick W. Stuart, Roderick W. (2002). Royalty for Commoners: The Complete Known Lineage of John of Gaunt, Son of Edward III, King of England, and Queen Phillipa, 4th ed. Baltimore, Maryland: Genealogical Publishing Co.
It may be possible to confirm family relationships with Katherine by comparing test results with other carriers of her mitochondrial DNA.
Mitochondrial DNA test-takers in the direct maternal line: