Tahdayo Mahntayl was a former Charisian nobleman.

In the Year of God 890, with the help of the Group of Four, Mahntayl claimed the Earldom of Hanth with falsified evidence of his descendancy from Earl Fraidareck. He was removed from the position once the Kingdom of Charis declared its independence from the Church of God Awaiting, and the rightful heir, Hauwerd Breygart of the Royal Charisian Marines, took his place. (OAR, BSRA)