The two are the same name. Herz is Yiddish and German for "deer".
Naphtali was a son of biblical Jacob. The tribal symbol for Naphtali is a deer
because Jacob described him as "a hind let loose," a swift-footed animal. See
HERZFELD, HIRSCHFELD, BUXBAUM, BUCHSBAUM, LINDENBAUM-Skwarzawa, Sielec
Bienkow, Glinyany, Jaryczow Nowy-Galicia
MINOFF, MINOWICKI, MINOWITZKI-Brest-Litovsk, Wysoko-Litovsk-Belarus