Fran, Maria

There's not always logic in the relationship between English/Yiddish/Hebrew
names. Sometimes there's no connection at all. We can only go by the amount
of examples we see, unless there's a direct translation.

Chaim is often Hyman in English. Can't see any reason for it to be Jacob
(in Hebrew, Yaakov, in Yiddish, often Yankel).

Only thing is people often had 'double' names e.g., Chaim Yaakov ben XX,
yet were known simply as Yankel.

My own Hebrew names is Chaim Levi ben Yaakov

It's not easy!

Harvey Kaplan
Glasgow, Scotland