I have many Wolf's in my family tree. My father, born in Poland,
was named after a Wolf and in Polish, his name was Wilo, in German,
it was Wilhelm (on papers when we came to Canada), and in Canada
it's been William (or Bill). A cousin of his named after the same
Wolf ancestor who emigrated to the USA in the 1930s was also William.
By the way, the name in Yiddish is Velvel and in Hebrew, it's Ze'ev.

Renate Krakauer