Thiadsvind also known as Theudesinda or Theodelinda (born 677) was a Frisian princess, the daughter of Redbad, King of the Frisians. In 711 she was married to Grimoald the Younger the eldest son of Pepin of Herstal. The marriage was officiated by archbishop or bishop of the Frisians Willibrord.it Liber Pontificalis (Corpus XXXVI 1, side 168) en Beda Venerabilis (Corpus XLVI9, page 218) Her husband had 2 illegitimate sons: Theudoald and Arnold.
References
Sources Liber Histoariae Francorum, Annales Mettenses.