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From Arabic حَسَن (ḥasan, “fine, good, good-looking, handsome, manly; strong”).
Arabic حَسَّان (ḥassān, “doer of good”)
From Hebrew חַזָּן (khazán, “cantor”), possibly via Ladino hassan.
Anglicized form of Irish Ó hOsáin.
From the nearby temple of the Hindu goddess Hasanamba.