Nessy is an English familiar form of the Dutch, English, German, and Scandinavian Agnes.
Nessy is also an English form of the English and German Vanessa.
Nessy is uncommon as a baby girl name. It is not in the top 1000 names. Out of the family of girl names directly related to Nessy, Vanessa was the most widely used in 2018.
Baby names that sound like Nessy include Necee, Necey, Necie, Necy, Nesi (English), Nessi (English), Nessie (English and Scottish), Nacheena, Nacia (Polish), Nadjah, Naema, Naemah, Naenea, Nagwa, Nagwah, Naia, Nainsey, Nainsi, Naissa (French), and Naiya.
† approx pronunciation for Nessy: N as in "knee (N.IY)" ; EH as in "ebb (EH.B)" ; S as in "see (S.IY)" ; IY as in "eat (IY.T)"