Quite numerous: Cork. Ir. Ó Dornaigh. Possibly derived from the old name Ó Tórna which occurs in Mainistir Ó dTórna, Abbeydorney, in Kerry.MIF.
fairly rare: Kilkenny and scattered. Ir. Ó Doirinne (SGG). MacLysacht has reservations on this, as he found a number O'Dorneys in 16 cent records which would indicate something like Ó Dorna, Ó Dornaigh. See also Dorney. MIF.
Dorney: Corcaigh. Seo leagan de Bhulbh - ceapann Mac Giolla Iasachta gur Ó Dornaigh a bhí ann agus roimhe sin Ó Tórna. Ainm baineann is ea Doireann. MIF.
Dorney: líon beag: Corcaigh. Bhí siad i gCorcaigh sa 16 céad. Féach Ó Tornaigh.