Mancunians, Bajans, and Haligonians

Those, believe it or not,  are demonyms, i.e., "the category of words describing either a person from a certain place, or a property of that place, like New Yorker or Italian".  Mancunians, for example,  are folks from Manchester.

It seems there is no way to logically deduce what any particular demonym is. You just have to know.  Although once you do know, there is a logical reason for the demonym.  Usually.  But really, you just have to know.

And this essay will let you in on a few of them.

Like Haligonian.