Encyclopaedia Britannica, 2020:

"The Ossianic controversy was finally settled in the late 19th century, when it was demonstrated that the only Gaelic 'originals' that Macpherson had produced were poor-quality Gaelic translations of his own English compositions. The name Ossian, popularized by Macpherson, superseded Oisín, though they are often used interchangeably.

"The term Ossianic ballads refers to genuine late Gaelic poems that form part of the common Scots-Irish tradition and should not be confused with the romanticized epics of 'Ossian.'"