mäsnikkä (Ingrian) comes from Russian мясни́к, from Russian мя́со, from Proto-Slavic męso, from Proto-Balto-Slavic mēnsā́ˀ, from Proto-Balto-Slavic mḗns, from Proto-Indo-European mḗms, from Proto-Indo-European mems-, from Proto-Indo-European me-ms-.
mäsnikkä (Ingrian): butcher