From a story on hiking tours of Ireland, contrasting descriptions of the guides:

If Tony was ever the polite gentleman, Mike was our hot-headed guide. He was quick to order a pint or tell you a joke, and he had an opinion about everything. He told no-holds-barred stories about Irish politicians, the tourist industry, past hiking trips, and his views on the Catholic Church. You got an earful from Mike on any subject, whether you wanted to or not.

Most of the Mangans in the United States came over from Ireland, as far as I know. And an astonishing number of them are just like the Mike mentioned above (except when, like me, they’re even more annoying.)