Robert was the son of Gilles I de Beaumetz and Agnès de Coucy. The date and place of his birth have not been found.
|
Gilles I de Beaumetz |
Hugues de Beaumetz |
| ||||||
| | ||||||||
|
Arnould I de Guînes |
+ | |||||||
|
Mahaut de Saint-Omer |
+ | |||||||
|
Agnès de Coucy |
Raoul I de Boves |
Enguerrand II de Boves |
+ | |||||
|
Agnès de Beaugency |
+ | |||||||
|
Adélaïde de Dreux |
Robert I de Dreux |
+ | ||||||
|
Agnès de Baudément |
+ |