Yes, somehow the thread got locked but southendmd unlocked it for us.
That's very interesting about the names.
I noticed this: VARIANTS: Kay (Frisian),
and it made me think of a breed of horse, the Friesian, and I wondered if it was German (I am appallingly, embarrassingly bad at geography, but I have other qualities
). I looked up both spellings and found this:
The Friesian is a horse breed originating in Friesland, in the Netherlands.
The Frisians are a Germanic ethnic group native to the coastal parts of the Netherlands and Germany.
One can certainly learn a lot here