This is an Irish last name originating in Kinsale Ireland. People with this last name are the most hardcore big time people you will ever meet. You can always spot one by their stunning good looks, their witty one liners and the fact that they are way cooler than anyone else. Also known to use the word asshole at least 50 time a day.
"Did you hang out with McDonnell last night? "
"Um yea funniest fucker I've ever met. And so good looking too. Wish I could be as awesome as a McDonnell. Asshole!"