恩顧 is read as おんこ (onko) and means favour.
おんこ
onko
おんけい
grace
おんがえし
requital of a favour
おん
favour
おんじん
benefactor
おんきゅう
a lord giving a land holding to a vassal
おんし
Imperial gift
おんしらず
ungrateful
teacher (to whom one owes a debt of gratitude)
おんしゃ
amnesty
おんぎ
obligation
おんてん
おんち
land received in compensation for one's service