Hi Diana

Frances is correct , we need to know when , if you don't know exactly, then approximately. Also note that when researching the Kennagh family of the Isle of Man , you need to look for Kenna, Kenna, Kinnah, Kennaugh, Kenney, Keaney and even Kewney.
Some sites show some of these variants , some don't.
Cheers
David Dwyer.