John# Beaufort 1st Earl of Somerset, Marquess of Dorset

  Notes:

John Beaufort, 1st Earl of Somerset (c. 1373 – March 16 was the first of the four illegitimate children of John of Gaunt , Duke of Lancaster , and his mistress Katherine Swynford , later his wife. Beaufort was born in about 1371 and his surname probably reflects his father's lordship of Beaufort in Champagne, France
The family emblem was the portcullis which is shown on the reverse < of a modern British 1p coin . John of Gaunt had his nephew Richard II of England declare the Beaufort children legitimate in 1390 , Gaunt married their mother in January 1396. Despite being the grandchildren of Edward III of England , and next in the line of succession after the Lancasters , their father's legitimate children, by agreement they were barred from the succession to the throne.

John# married Margaret# Holland.