William of What's it's Razor

[justcarol67]

I've recently been enjoying the Occam's/Ockham's razor thread on the
main list and started wondering about the variant spellings. I've
always spelled it "Occam's," and Merriam-Webster Online gives
"Occam's" as the main entry with "Ockham's" as an alternate spelling,
but the placename is spelled "Ockham," and William himself is
generally called William of Ockham, AFAIK.

Does any one know whether one spelling is more correct than the other?
Maybe "Occam" is an Americanism? (I don't suppose Noah Webster
"improved" that spelling as he did by dropping the "u" in such words
as "colour" and "behaviour." Or did he?)

Carol, just curious but also liking to get things right