According to earlier historians following K. Hopf, he succeeded to this position upon his father's death in 1263/6. He was also thought to have become Baron of Passavant and marshal in the Principality of Achaea from an hypothetical marriage to Margaret de Neuilly,[3] because he was improperly called "marshal" in Sanudo's Istoria di Romania.[4] These views have been challenged by Raymond-Joseph Loenertz in the 1960s.