High Quality Content by WIKIPEDIA articles! Waltheof (also Waldef or Waldeve) (c. 1095–1159) was a 12th century English abbot and saint. He was the son of Simon I of St Liz, 1st Earl of Northampton and Maud, 2nd Countess of Huntingdon, thus stepson to David I of Scotland, and the grandson of Waltheof, Earl of Northampton.