The -oald element in his name (from Proto-Germanic *waldaną, to rule) was especially common among the Agilolfing family of neighbouring Bavaria, who were of Frankish origin.
According to Paul the Deacon, Gaidoald was assigned to Trent by King Agilulf, who was Euin's brother-in-law, their wives being sisters.
[4] For reasons unknown, Gaidoald and Duke Gisulf II of Friuli broke with Agilulf—"refused contact" in Paul's words.
[6] The king's daughter and son-in-law, Godescalc, duke of Parma, were captured and Kallinikos achieved several military victories over Agilulf's forces.
[1] In celebration of the peace, Agilulf had his son Adaloald baptised at Monza on 7 April 603 with Secundus acting as godfather.