Donahey

Donaghy/Donahey is not strictly a variant of Ó Donnchadha but of Ó or Mac
Donnchaidh. I have included Donaghy/Donahey on my variant listings because in many
family histories the names Donohoe and Donaghy have been interchanged.

Source #1:
Richard Donahey
Source #2:
Source #3:
Source #4:
Source #5: