Nika sits next to 4 phonetic neighbors — Nica, Nicky, and Mika are the closest matches by sound. Most share Nika's Slavic cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"victory"
"she who brings victory"
"beautiful, of light"
"gracious one"
"of Apollo, god of light"
"protector of men"
"healer, one who heals"
"successful, prosperous"
"from Hadria, from the Adriatic"
"stranger, foreigner (from xenos)"
"fairy queen, princess"
"sea, ocean"
"strong, enduring"
Similar sound: These names share phonetic patterns with Nika — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Nika.
Rhythm: Nika is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.