John I. Count of Ponthieu
circa 1140 - 1191 (~ 51 years)(
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- 1 John I. Count of Ponthieu [1] b. circa 1140 d. 1191
- Beatrice deCandvaine of St. Pol b. circa 1145
- 2 William IV Count of Ponthieu [1.1] b. 1159 d. 1221
- Alice of France b. Aft 1160 d. Bef 1191
- 3 Countess Marie of Ponthieu [1.1.1] b. circa 1188 d. 1251
- Simon Count of Dammartin b. circa 1180 d. 1239
- 4 Joan de Dammartin, Countess of Ponthieu [1.1.1.1] b. circa 1220 d. 1279
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- 4 Joan de Dammartin, Countess of Ponthieu [1.1.1.1]
- 3 Countess Marie of Ponthieu [1.1.1]
- 2 William IV Count of Ponthieu [1.1]
