Theudoald (or Theodald; (707/708 – 741) was the mayor of the palace, briefly unopposed in 714 until Ragenfrid was acclaimed in Neustria and Charles Martel in Austrasia by the nobles, after the death of his grandfather, Pepin of Heristal. He was the illegitimate son of Grimoald II and Theudesinda of Frisia and thus a grandson of king Radbod. His grandmother Plectrude tried to have him recognised by his grandfather as the legitimate heir to all the Pippinid lands, instead of the illegitimate Charles Martel. His grandmother surrendered on his behalf in 716 to Chilperic II of Neustria and Ragenfrid. He died, probably killed, around 741, after the death of his uncle and protector, Charles Martel. It is notable that, despite his having been proclaimed heir to Pepin the Middle, when Charles Martel seized power, he allowed his nephew to live, instead of killing him, as was the wont in the Middle Ages.