Mafalda de Dammartin, Countess regnant of Boulogne, was born circa 1160 to Renaud I, Count of Dammartin (c1165-1227) and Ida de Boulogne (c1160-1216) and died 1216 of unspecified causes. She married Philippe I Hurepel (1201-1235) 1223 JL . She married Afonso III of Portugal (1210-1279) 1238 JL . William I of England (1027-1087), Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Hugh Capet (c940-996)/s, Rollo of Normandy (860-932)/s.
|Offspring of Mafalda de Dammartin and Philippe I Hurepel (1201-1235)|
|Albert de Clermont|
|Offspring of Mafalda de Dammartin and Afonso III of Portugal (1210-1279)|
|Roberto of Portugal (1239-1239)|