 The name is borne by a character in Irish mythology—Oscar, grandson of Fionn Mac Cumhaill, and refers to his descent from his grandmother, Sadhbh, who was enchanted in the form of a deer.Alternatively, it may derive from the Old English name OSGAR or its Old Norse cognate ÁSGEIRR, which may have been brought to Ireland by Viking (Germanic) invaders and settlers.The name (Oscar) was popularised in the 18th century by James Macpherson, creator of 'Ossianic poetry'.