As he first appeared in contemporary records in a royal charter, issued on 29 September 1313, according to its date, when he was already Judge royal, Lampert's early life and career advancement cannot be reconstructed. Similarly to his relative Lack, he became part of King Charles' inner circle suddenly. In that charter the King ordered Lampert to move to Buda. Beside that he was also referred to as ispán of Csanád County. He was next mentioned by a diploma from 8 July 1315, when he resided in Lippa (today Lipova, Romania).
