hänetheidän
Hänetheidän is a term that does not appear in standard Finnish dictionaries or grammar references. In linguistics discussions it is sometimes treated as a hypothetical or nonstandard pronoun formed by blending two separate pronoun families: hänet, the object form of the third-person pronoun hän (he/she), and heidän/heidän, the possessive determiner meaning “their.” The form is not attested in ordinary language use and has no conventional status in contemporary Finnish.
Etymology and interpretation are unsettled because the constituent parts come from different grammatical slots: one is
Status in usage remains speculative. Because it is not part of the standard language, it is rarely,