On 11 May 1315 Frederick had married Isabella of Aragon , daughter of King James II of Aragon with Blanche of Anjou , an ambitious woman with an immense dowry .
Head entity: isabella of aragon Q441662 7 8 9
Tail entity: blanche of anjou Q167180 19 20 21
Relation (head \u2192 tail): P25
Inverse relation (tail \u2192 head): P40