Henry VII of England Margaret Beaufort, Countess of Richmond. His father, Edmund Tudor, 1st Earl of Richmond, died three months before his birth. Henry's paternal grandfather, Owen Tudor, originally from the Tudors of Penmynydd, Isle of Anglesey in Wales, had been a page in the court of Henry V. He rose to become one of the "Squires to the Body to the King" after military service at the Battle of Agincourt. Owen is said to have secretly married the widow of Henry V, Catherine of Valois. One of their sons was Edmund Tudor, father of Henry VII. Edmund was created Earl of Richmond in
House of Tudor Catholic Mary I. On 1 November 1455, John Beaufort's granddaughter, Margaret Beaufort, Countess of Richmond and Derby, married Henry VI's maternal half-brother Edmund Tudor, 1st Earl of Richmond. It was his father, Owen Tudor (), who abandoned the Welsh patronymic naming practice and adopted a fixed surname. When he did, he did not choose, as was generally the custom, his father's name, Maredudd, but chose that of his grandfather, Tudur ap Goronwy, instead. This name is sometimes given as "Tewdwr", the Welsh form of Theodore, but Modern Welsh "Tudur", Old Welsh "Tutir" is originally not a variant but a different