I really like both of your lists! A lot of Slavic and traditional names. I'm from Czechia, and these are rarely used nowadays. My favorite is
Viktor "
Vitya". I love
Vitya, though I'd choose
Vitaliy as the full name. Yukhym is new to me; I like the sound and meaning. Horyk is a cute nickname. Too bad there isn't an equivalent to it in Czech. Igor/Ihor sounds a bit too strict/tough. From the girls' list, I especially enjoy
Svitlana "Svitka" and Yaryna "Yarka".