Chilperic II
Theudoald was the legitimate but later claimed illegitimate son of Grimoald II (son of Pepin II of Herstal and Plectrude) and Theudesinda of Frisia (daughter of king Radbod). Thus, he was a grandson of the Frisian king. His grandmother Plectrude tried to have him recognised by his grandfather as the legitimate heir to all the Pippinid lands, instead of Charles Martel. His grandmother surrendered on his behalf in 716 to Chilperic II of Neustria and Ragenfrid.