Traduzione - Arabo-Francese - ould

Arabic family names often feature 'ould". What does it mean? I know that "Ibn" means "son of" for instance

<Admin's remark>
This request is no longer acceptable according to our new submission rules.

Ould = le terme mauritanien pour "Ibn", "Ben", "Bin" (arabe classique)
Je me réponds à moi-même. En fait j'ai demandé à une amie sénégalaise...