Where does “деснъ” come from?
деснъ (Old Church Slavonic) comes from Proto-Slavic desnъ, from Proto-Slavic desinъ, from Proto-Balto-Slavic deśinas, from Proto-Indo-European déḱs-i-no-s, from Proto-Indo-European deḱs- — right.
деснъ (Old Church Slavonic): right
Ancestry of “деснъ”, step by step