Ó Cuirnín was the name of a brehon literary family of Breifne, related to its kings, the O'Rourkes.
The surname is now rendered Cornyn ( most commonly used Anglacised form )still quite numerous in the vicinity of Dowra in West Cavan. Courneen, Corneen, Coorneen, Curneen, or more rarely, Courtney.
See also
- The monk O'Curnin, a pious sage, died 1258
- Tomás Ó Curnín, ollav of the Fir Brefne,, died 1400
- Cormac Ó Curnín, died 1475
- Ruaidrí Ó Curnín, died 1496
- Conor Carragh Ó Curnín, died 1498
- Ferceirtne Ó Curnín, died 1519
- Domhnall Glas Ó Curnín, died 1519
