Robert I, Count of Artois
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| PARENT (M) Louis VIII of France | |||
| Birth | |||
| Death | |||
| Marriage | to Blanche of Castile | ||
| Father | Philip II of France | ||
| Mother | Isabelle of Hainaut | ||
| PARENT (F) Blanche of Castile | |||
| Birth | |||
| Death | |||
| Marriage | to Louis VIII of France | ||
| Father | Alfonso VIII of Castile | ||
| Mother | Eleanor of England | ||
| CHILDREN | |||
| M | Charles I of Naples | ||
| Birth | |||
| Death | |||
| Marriage | to Beatrice of Provence | ||
| M | Robert I, Count of Artois | ||
| Birth | |||
| Death | |||
| Marriage | to Matilda of Brabant, Countess of Artois | ||
| M | Louis IX of France | ||
| Birth | |||
| Death | |||
| Marriage | to Marguerite of Provence | ||
| PARENT (M) Robert I, Count of Artois | |||
| Birth | |||
| Death | |||
| Marriage | to Matilda of Brabant, Countess of Artois | ||
| Father | Louis VIII of France | ||
| Mother | Blanche of Castile | ||
| PARENT (F) Matilda of Brabant, Countess of Artois | |||
| Birth | |||
| Death | |||
| Marriage | to Guy III, Count of Saint-Pol | ||
| Marriage | to Robert I, Count of Artois | ||
| Father | Henry II, Duke of Brabant | ||
| Mother | Maria of Swabia | ||
| CHILDREN | |||
| F | Blanche of Artois | ||
| Birth | |||
| Death | |||
| Marriage | to Henry I of Navarre | ||
| Marriage | to Edmund Crouchback, 1st Earl of Lancaster | ||
+ Edward II b: 25 APR 1284 d: 21 SEP 1327
5 Edward III b: 13 NOV 1312 d: 21 JUN 1377
6 John of Gaunt, 1st Duke of Lancaster b: 6 MAR 1340 d: 3 FEB 1399
+ Blanche
7 Henry Beaufort b: ABT 1375 d: 11 APR 1447