Robert d'Alencon II
Robert was born about 1039 in Perche, France.

 Agnes de Ponthieu
Agnes was born about 1066 in France.  She died in 1103 in Ponthieu, France.

 Duke Guillaume d'Alencon III
Guillaume was born about 1055 in Alencon, Orne, France.  He died in 1172.