Wiki information Gondulph:

Gondulph of Maastricht
Deceased Person, Person

Gondulph of Maastricht, sometimes of Tongeren was a Bishop of Tongeren-Maastricht and is venerated as a Roman Catholic saint. Saint Gondulph is a patron saint of the city of Maastricht together with Saint Monulph. His feast day is 16 July or 17 June.