1. HELGAUD¹ _____ was born between 816 and 912, and died in 926^[4].
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HERLOUIN II2 _____, d. in 945.

2. HERLOUIN II² _____ (Helgaud _____¹), son of (1) Helgaud¹ _____, was born between 835 and 927, and died in 945^[4]. ^[4]
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ROGER3 _____, d. after 957.

3. ROGER³ _____ (Herlouin II _____², Helgaud _____¹), son of (2) Herlouin II² _____, was born between 849 and 946, and died between 957 and 1055^[4]. ^[4]
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GUILLAUME I4 _____, d. in 965.

4. GUILLAUME I⁴ _____ (Roger _____³, Herlouin II _____², Helgaud _____¹), son of (3) Roger³ _____, was born between 861 and 951, and died in 965^[4]. ^[4]
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HILDOUIN5 _____, d. after 981.

5. HILDOUIN⁵ _____ (Guillaume I _____⁴, Roger _____³, Herlouin II _____², Helgaud _____¹), son of (4) Guillaume I⁴ _____, was born between 871 and 966, and died between 981 and 1075. ^[4]
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COUNT HUGUES I6 DE PONTHIEU, m. (W-14) GISELE OF FRANCE, daughter of (W-11) King Hugh Capet and (CS-6) Adelaide (of POITOU).

6. COUNT HUGUES I⁶ DE PONTHIEU (Hildouin _____⁵, Guillaume I _____⁴, Roger _____³, Herlouin II _____², Helgaud _____¹), son of (5) Hildouin⁵ _____, was born between 885 and 1032, and died between 936 and 1142. He married (W-14) GISELE OF FRANCE, daughter of (W-11) King Hugh Capet and (CS-6) Adelaide (of POITOU). ^[4]
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COUNT ENGUERRAND I7 DE PONTHIEU, d. in 1046; m. ADELE OF HOLLAND.

7. COUNT ENGUERRAND I⁷ DE PONTHIEU (Hugues I⁶, Hildouin _____⁵, Guillaume I _____⁴, Roger _____³, Herlouin II _____², Helgaud _____¹), son of (6) Count Hugues I⁶ and (W-14) Gisele (of FRANCE), was born between 936 and 1032, and died in 1046^[4]. He married ADELE OF HOLLAND.
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COUNT HUGHES II8 DE PONTHIEU, d. in 1052; m. BERTHA DE AUMALE.

8. COUNT HUGHES II⁸ DE PONTHIEU (Enguerrand I⁷, Hugues I⁶, Hildouin _____⁵, Guillaume I _____⁴, Roger _____³, Herlouin II _____², Helgaud _____¹), son of (7) Count Enguerrand I⁷ and Adele (of HOLLAND) (DE BOULOGNE), was born between 950 and 1038, and died in 1052^[4]. He married BERTHA DE AUMALE.
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COUNT GUY I9 OF PONTHIEU of Ponthieu, France, d. in 1100; m. ADA _____.

9. COUNT GUY I⁹ OF PONTHIEU (Hughes II de PONTHIEU⁸, Enguerrand I⁷, Hugues I⁶, Hildouin _____⁵, Guillaume I _____⁴, Roger _____³, Herlouin II _____², Helgaud _____¹) of Ponthieu, son of (8) Count Hughes II⁸ and Bertha (de AUMALE), was born between 990 and 1053, and died in 1100^[1]. He married ADA _____. ^{[2, 3]}
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AGNES10 OF PONTHIEU of Ponthieu, m. (ACY-10) COUNT ROBERT II DE BELLEME of Alencon, France, b. in 1035, d. in 1113, son of (ACY-5) Roger, Earl of Shrewsbury and (LP-5) Mabel (TALVAS).

10. AGNES¹⁰ OF PONTHIEU (Guy I⁹, Hughes II de PONTHIEU⁸, Enguerrand I⁷, Hugues I⁶, Hildouin _____⁵, Guillaume I _____⁴, Roger _____³, Herlouin II _____², Helgaud _____¹) of Ponthieu, daughter of (9) Count Guy I⁹ and Ada (_____), was born between 1019 and 1080, and died between 1074 and 1190. She married (ACY-10) COUNT ROBERT II DE BELLEME of Alencon, son of (ACY-5) Roger, Earl of Shrewsbury and (LP-5) Mabel (TALVAS), who was born in 1035, and died in 1113. ^{[4, 2]}
dau. of Guy I, Count of Ponthieu, and a descendant of Hugh de Montgomery
Child: See (ACY-10) Count Robert II de BELLEME