The House of Grimaldi , descended from Otto Canella , a Genoese statesman , and taking their name from his son Grimaldo , were an ancient and prominent Guelphic Genoese family .
Head entity: grimaldo Q629759 21
Tail entity: otto canella Q3357798 7 8
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P22