The name McCartney is of Scottish origin, derived from the Gaelic 'MacCarthy', which means 'son of Cormack'. This surname is often associated with the prominent Irish clan, the MacCarthys of Desmond, who were one of the most powerful families in medieval Ireland. The name was brought to England during the Norman conquest and has since been widely adopted by English-speaking populations worldwide.
"The name McCartney saw a steady increase in popularity from 2002 to 2015, with a peak of 23 births in 2008. Since then, it has maintained a consistent presence, with fluctuations ranging between 5 and 21 births annually."