Thiadsvind also known as Theudesinda or Theodelinda (677 - ?) was the daughter of the Friesian king Redbad. In 711 she was married to Grimoald the Younger the eldest son of Pepin of Herstal. The marriage was officiated by archbishopric or bishopric of the Frisians Willibrord. They had two sons: Theudoald and Arnold.
- Halbertsma, H. (1982), Frieslands Oudheid (pdf-file), page 794.
- it Liber Pontificalis (Corpus XXXVI 1, side 168) en Beda Venerabilis (Corpus XLVI9, page 218)
- Liber Histoariae Francorum,
- Annales Mettenses.