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"
"successful, prosperous"
"stranger, foreigner (from xenos)"
"new, modern"
"bright, shining one"
"defender of mankind"
"sea, ocean"
"of Apollo, god of light"
"true image, sacred icon"
"Asia, the eastern continent"
"fairy queen, princess"
"gracious one"
"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.