nimeensä
Nimeensä is not a standard dictionary form in Finnish. It is sometimes encountered in text as a supposed possessive form of the noun nimi (name), but the canonical 3rd-person possessive form of nimi is nimensä. The possessive suffix -nsä (written as -nsä or -sä depending on vowel harmony) attaches to the noun stem to indicate ownership by the subject of the clause (he, she, or they). When combined with nimi, the intended, correct form is nimensä, meaning “one’s own name” or “the name of the person.”
In practice, nimensä is used in sentences such as Hän sanoi nimensä. or Hänen nimensä on Aino,
Nimeensä illustrates a broader feature of Finnish morphology: the language forms possessive meanings directly on nouns