Pierre I de Dreux Mauclerc Ct de Brittany
Pierre I de Dreux Mauclerc was born about 1187.¹   He died in 1250.  He was buried in Acceded: 1213..^1 1 

 Alice de Thouars de Brittany Dss de Brittany
Alice de Thouars de Brittany was born in 1201.¹   She died at the age of 20 in 1221.  She was buried in Acceded: 1203..^1 1 

 Yolande de Dreux
Yolande was born in 1218 in Dreux.¹   She died at the age of 54 in 1272.¹