"Variant of Hershel"
The name Hershy is commonly a male name from the "Yiddish" origin.
Hershy is a phonetic English spelling of the Yiddish diminutive of Hershel, which derives from Hirsh, the Yiddish word for deer and a cognate of German Hirsch. The final y records how the diminutive is pronounced rather than marking a separate name.
Hershel means "Deer".
The pronunciation of Hershy is HUR-shee.