No, I haven't been studying British royalty. I just got back from the Herman's Hermits concert over in Lancaster at the American Music Theater. One of their big hits was "Henry VIII" from back in the early 1960's....
As Peter Sellers once said, "O, my goodness gracious me!" I can still hear them singing that.
"... She's been married seven times before /And every one was a Hen-e-ry / She wouldn't have a Willy or a Sam (No Sam)..."
I remember there was a local pop station, C-FUN, which ran a contest for "The C-Funtastic 50" where you could win the top 50 singles- and I did, in 1966, when I was 14. I can still remember answering the phone call when it came in. My poor parents suffered through those discs for a few years. and must have been relieved when I went into classical music. I think I may still have one somewhere.
Didn't know its origin:
...[it] is a 1910 British music hall song by Fred Murray and R. P. Weston. It was a signature song of the music hall star Harry Champion... But in 1965, it became the fastest-selling song in history to that point when it was revived by Herman's Hermits...
According to one source, Champion "used to fire off [the chorus] at tremendous speed with almost desperate gusto, his face bathed in sweat and his arms and legs flying in all directions." In later versions recorded by Champion, "Willie" is changed to "William" because the former is a British slang term for... (you'll have to look it up in your Funk & Wagnall's because I might get infracticated for indelicate terminology

) LVSteve and RustyT1953 will know.
Cor strewth, 'ere's the original by the man 'imself:
[ame]https://www.youtube.com/watch?v=gkbE4URVcKY[/ame]
Thanks for the cruise down memory lane!