So, how did the good folks of Glasgow come to be called
"Glaswegian"? In English, wouldn't the more likely derivative of
"Glasgow" be "Glasgovian"? Or even the clumsy "Glasgowite"?
Probably, but the point is, the word goes back such a long way that
its origin is not English. It is Medieval Latin, a legacy of the
Roman presence in Britain. People of the nearby region of Galloway
were called, by the Romans, Galwegians, and when Glasgow was
founded, in the late 6th century, the suffix hung on -- even if the
Romans hadn't. (The Norse came to be Norwegian in much the same
way.) We're glad we asked.