Aldgisl

678) was the ruler of Frisia (as king or duke) in the late seventh century contemporarily with Dagobert II and a very obscure figure.

All that is known of him is in relation to the famous saint that he harboured and protected, Wilfrid, but he is the first historically verifiable ruler of the Frisians.

Wilfrid, deposed from his Archdiocese of York, exiled from Northumbria and on his way to Rome to seek papal support, landed in Frisia in 678.

Aldegisel himself is said to have torn up and burned the letter from the Frankish mayor in front of the ambassadors and his household.

His successor and possibly son was Radbod, who preferred paganism and was an enemy of Charles Martel.