Jasper Tudor (c. 1431-1495): daughter of Catherine of Valois, the widow of King Henry V, and her Welsh servant Owen Tudor. Having no English royal blood, or even English noble blood, they were entirely dependent on the then-current Lancastrian dynasty. Jasper's half-brother Henry VI made him Earl of Pembroke -- but he lost the earldom when Edward IV overthrew Henry VI. Jasper fought hard to restore the Lancastrians, and when his nephew Henry VII managed to seize the throne in 1485, it was largely due to Jasper's effort. Henry VII made him Duke of Bedford and married him to the widow of the Duke of Buckingham. He was also one of the king's chief counselors.