[1] The personal name Ruaidhrí is composed of two elements: the first is ruadh, meaning "red"; the second is rí, meaning "king".
[2] Surnames which are in some cases derived from Mac Ruaidhrí include: 'Creery, Creary,[3] McCreary,[4] McCrery,[4] McCrorey,[5] McCrorie,[5] McCrory,[5] McGroary,[1] McGrory,[1] McRorie,[6] McRory,[6] McRury,[6] Roger,[7] Rogers,[8] Rorie,[9] Rorison,[9] and Rory.
[10] Surnames which are in some cases derived from Mac Ruidhrí include: Creary,[3] McCrary,[11] McCreary,[4] McCreery,[4] and McCrery.
[12] Members of this Scottish family settled in Ulster as gallowglass commanders in the Middle Ages, and are last recorded acting as such in the fourteenth century.
[13] A family bearing forms of the name produced herenachs for the parish of Ballynascreen.