Born from 849, died ± 874, approximately 25 years. Source for person1)
Sources
1)source: FamilySearch Stamboom Radboud_ V van FrieslandGeslacht: ManGeboorte: Van 849Overlijden: Ongeveer 874Vader: Walger van FrieslandEchtgenote: Dogter van Dirk II van Friesland van FrieslandKinderen: Dirk van Holland, Dirk I (Thierry I) van HOLLAND **, Walager III van Friesland, page: https://www.myheritage.nl/research/collection-40001/familysearch-stamboom?itemId=419092332&action=showRecord