John of Avesnes
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| PARENT (M) Bouchard IV of Avesnes | |||
| Birth | |||
| Death | |||
| Marriage | to Margaret II, Countess of Flanders | ||
| Father | James of Avesnes | ||
| Mother | Adela | ||
| PARENT (F) Margaret II, Countess of Flanders | |||
| Birth | |||
| Death | |||
| Marriage | to William II of Dampierre | ||
| Marriage | to Bouchard IV of Avesnes | ||
| Father | Baldwin I of Constantinople | ||
| Mother | Marie of Champagne | ||
| CHILDREN | |||
| M | John of Avesnes | ||
| Birth | |||
| Death | |||
| Marriage | 9 OCT 1246 | to Adelaide of Holland, Countess of Hainaut | |
| PARENT (M) John of Avesnes | |||
| Birth | |||
| Death | |||
| Marriage | 9 OCT 1246 | to Adelaide of Holland, Countess of Hainaut | |
| Father | Bouchard IV of Avesnes | ||
| Mother | Margaret II, Countess of Flanders | ||
| PARENT (F) Adelaide of Holland, Countess of Hainaut | |||
| Birth | ABT 1230 | ||
| Death | |||
| Marriage | 9 OCT 1246 | to John of Avesnes | |
| Father | Floris IV, Count of Holland | ||
| Mother | Matilda of Brabant, Countess of Holland | ||
| CHILDREN | |||
| M | John II, Count of Holland | ||
| Birth | |||
| Death | |||
| Marriage | to Philippa of Luxembourg | ||
+ Adelaide of Holland, Countess of Hainaut b: ABT 1230
+ Edward III b: 13 NOV 1312 d: 21 JUN 1377
5 John of Gaunt, 1st Duke of Lancaster b: 6 MAR 1340 d: 3 FEB 1399
+ Blanche
6 Henry Beaufort b: ABT 1375 d: 11 APR 1447
