how do you find out what your last name means?mine is donnelly?

Question

if you know what donnelly means can you tell me?

thanks i found it at donnelly.org

Answer 1

Donnelly
Irish: reduced Anglicized form of Gaelic Ó Donnghaile ‘descendant of Donnghal’, a personal name composed of the elements donn ‘brown-haired man’ or ‘chieftain’ + gal ‘valor’. It is claimed that most bearers of this surname in Donegal descend from Donnghal O’Neill, 17th in descent from Niall of the Nine Hostages; there were also other families of the same name in Sligo and Cork.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4

Answer 2

haha my chemistry teachers name is Mr. Donnelly. He's Irish to the last.

Answer 3

There are many name sites on the web just google.

Answer 4

It's origin is Celtic and it means 'sincere'.