| Male Walter I d'Oisy, Lord of Avêsnes and Leuze |
| Birth | ||
| Death | ||
| Burial | ||
| Marriage | ||
| Father | Fasted II d'Oisy | F6151 Group Sheet | |
| Mother | Richilde | F6151 Group Sheet | |
| Female Ada of Mortagne |
| Birth | ||
| Death | ||
| Burial | ||
| Father | Everard I Radulf, Burggrave of Doornick | F6153 Group Sheet | |
| Mother | ||
| Male + Nicholas d'Avêsnes, Lord d'Avêsnes, Leuze and Conde |
| Birth | ||
| Death | Between 1169 and 1171 | |
| Burial | ||
| Spouse | Mathilda de la Roche | F3350 | |
| Marriage | Before 1150 | |
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Sources 🟢 Primary Evidence 🟡 Secondary Evidence 🟠 Tertiary Evidence 🔴 Unreliable Evidence |
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