Reconstruction:Proto-Finnic/-nci

Etymology
From. Cognates include 🇨🇬, 🇨🇬.

Reconstruction
Most Finnic varieties have (1) lost the final vowel, and (2) simplified the consonant cluster to s or z in the nominative, but longer endings -ns, -si, -nsi are attested from a scattered number of varieties: Southeastern Finnish (Kymi region), the Hevaha dialect of Ingrian, and Veps, and a few parishes of Savo Finnish. Earlier *-ns is also required by Livonian < *kolmaas (the expected reflex of  would be unattested ˣ), by Eastern Finnish long-vowel endings such as kolmaas, and probably also diphthongized endings such as Livvi and Upper Luga Ingrian.

Setälä (1899: 365–366) suspects that shorter -s and longer *-nsi may have persisted for long as parallel free variants.