Her father was the son of Edmund Crouchback , 1st Earl of Lancaster and Blanche of Artois , Queen Dowager of Navarre , a granddaughter of Louis VIII of France and Blanche of Castile .
Joan of Lancaster was born circa 1312 at Grosmont Castle in Monmouthshire .
Joan of Lancaster 's father was the son of Edmund Crouchback , 1st Earl of Lancaster and Blanche of Artois , Queen Dowager of Navarre , a granddaughter of Louis VIII of France and Blanche of Castile .
Joan of Lancaster was born circa 1312 at Grosmont Castle in Monmouthshire .