Where does “deviaty” come from?
deviaty (Slovak) comes from Proto-Slavic devętъ, from Proto-Balto-Slavic dewin(t)as, from Proto-Balto-Slavic newin(t)as, from Proto-Indo-European h₁néwn̥ — nine.
deviaty (Slovak): ninth
Ancestry of “deviaty”, step by step