I came across the linked article on commonly mispronounced words. Pretty good list. The first one really surprised me.

Children’s writer Theodor Seuss Geisel, more commonly known as Dr. Seuss, pronounced his middle name (and pen name) as soice, not soose.

From his Wikipedia page:

Geisel’s most famous pen name is regularly pronounced /ˈs(j)uːs/, an anglicized pronunciation inconsistent with his German surname (the standard German pronunciation). He himself noted that it rhymed with “voice”. Alexander Liang, one of his collaborators on the Dartmouth Jack-O-Lantern, wrote of it:

You’re wrong as the deuce
And you shouldn’t rejoice
If you’re calling him Seuss.
He pronounces it Soice (or Zoice)

Geisel switched to the anglicized pronunciation because it “evoked a figure advantageous for an author of children’s books to be associated with—Mother Goose” and because most people used this pronunciation.

Live and learn.