Maria Martin (Ma rye ya, usually) was commonly sung to one of the tunes that also carried some versions of Dives (and a great many more songs, the earliest known being the Scottish Gilderoy). Star of the County Down is an early 20th century composition set to the same tune.

Re the "new" Latin pronounciation: the re-assessment was based on a detailed analysis of Classical literature. If I remember correctly, one of the reasons for believing that Romans in the classical period pronounced v more-or-less as w is that there were a lot of Classical Latin puns which depended on that being the case. Medieval Latin was pronounced rather differently, of course.