niekomu
Niekomu is a rarely attested form in Polish that is sometimes described as a nonstandard or dialectal negation of the indirect object pronoun. It is said to convey the idea “to no one” or “to nobody” in contexts where the indirect object is negated. In contemporary standard Polish, the widely accepted form for this sense is nikomu, the dative form associated with nobody. Niekomu is not part of prescriptive grammar and is seldom listed in modern dictionaries.
Usage and status: Niekomu appears primarily in older literature, some regional varieties, and certain glossaries that
Form and etymology: The form combines the negation particle nie- with the dative pronoun komu (to whom).