Mija

Mija grew out of Marija, the Slavic form of Maria, worn down over generations into something shorter and fonder. As a diminutive it belongs to the family of pet names Polish speakers build from longer roots, the way Marysia and Maja also lean on Maria. The short form keeps the affection and drops the formal weight.

In Polish the name reads as miła, kochana: dear, beloved. That sense sits close to the diminutive itself, since a shortened name is usually a tender one. The meaning was attached through use rather than fixed by any single root.

On a school register in Poland, Mija would sit among the Mai and the Leny, a name that looks complete on its own. It is short. Two syllables, four letters, and a clear line back to Marija.