Meaning and Name Origin
Oisin \o(i)-sin\ as a boys' name is pronounced OH-sheen. It is of Gaelic origin. In Irish history, the name of the son of a legendary Gaelic poet, Fionn mac Cumhaill. Oisin mac Cumhaill was a warrior and bard too. The anglicized form Ossian was revived in the 18th century by James Macpherson as the name of the supposed author of some ancient Gaelic poetry which Macpherson claimed to have translated. It turned out that Macpherson had written much of the poetry himself.
Oisin is an uncommon first name for men. Oisin is a unique last name too for all people. (2000 U.S. Census)
Displayed below is the birth name popularity of Oisin for boys. Oisin reached its apex rank of #14 in Ireland in the year 2013, and is at #14 presently. (2014 Birth Statistics)