The Folk Process - Charles of Sweden to House of the Rising Sun
I was editing a 17th century commedia dell'arte inspired play and it included lyrics for a song, but had no tune provided. I went out searching for suitable tunes that might fit the lyrics (since it's easier for folks to perform a play when they don't have to write the songs anew) and in digging around I heard this tune, assigned to a 1680s Broadside, here called The English Courage. Nice enough, performed in a somewhat operatic style. Said to be to the tune of Charles of Sweden, which is clearly a folk tune with a lot of variants already.
But I'm listening to it and I realize... it's this song.
Other variants include The Cheat, Come Jolly Bacchus, Devil to Pay, The First of August, Frisky Jenny, The Tenth of June, and The Weaver's March.
Or if you just want to hear them because you can't read music either, here's some from YouTube.