https://www.johngrenham.com/findasurname.php?surname=noone
Surname Dictionary Noone numerous: Connacht, Midlands etc. Ir. Ó Nuadhain, possibly from Nuadha, a Celtic god. They were a sept of the Uí Fiachrach in Sligo. SGA gives Ir. Ó Nuáin. MIF. Ó Nuadhan Noone: líonmhar: Connachta & Lár na Tíre. Dream a mhaígh sinsearacht le Chairbre, mac le Niall Naoi-ghiallach agus a chónaigh i gCalraighe, Sligeach. Fréamh, de réir de Bhulbh, Nuada, an muir-dhia. Tá an leagan Ó Nuáin ag SGA. Féach Nuadhat.