Family: de Boulogne, Oswin / de Hainaut, Hiltrude (F13297)
m. 812-
Male
de Boulogne, Oswin
Birth 795 Ponthieu (Historical), Picardie, France 
Death 853 France Burial Marriage 812 [1, 2] France [1, 2] Father Mother
Female
de Hainaut, Hiltrude
Birth 778 France Death DECEASED France Burial Father de Tournehem, Helwin I | F13298 Group Sheet Mother of Flanders, Érmengarde | F13298 Group Sheet
Male
de Ponthieu, Count Helgaud
Birth 805 Ponthieu (Historical), Picardie, France Death 863 Picardie, France Burial 864 Ponthieu (Historical), Picardie, France Spouse Iñiguez, Princess Oñeca | F13295 Marriage 824 Kingdom of Neustria (Historical)
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Sources - [S789] WORLD: Family Search, Family Tree.
https://www.familysearch.org/search/tree/name - [S790] WORLD: Family Search, Ancestral File.
https://www.familysearch.org/search/genealogies
- [S789] WORLD: Family Search, Family Tree.