Meaning and name origin
Oisin \o(i)-sin\ as a boy's 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 not a popular first name for males and an equally uncommon surname or last name for all people (2000 U.S. Census).
Displayed below is the baby name popularity of the name Oisin for boys. Oisin reached its highest rank of #14 in Ireland in 2013. (2014 statistics).