Nina sits next to 5 phonetic neighbors — Mina, Lina, and Gina are the closest matches by sound. Most share Nina's Russian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"grace (diminutive of Anna)"
"from the city of Siena"
"devoted to Jove (Jupiter)"
"goddess of the moon"
"flourishing, prosperous"
"short form of names ending in -lia"
"famous in battle"
"lioness of God"
"diminutive of Julia; little Julia"
"friend, companion"
"mother, great one"
"beloved, wished-for child"
"grace, favor"
"pure, unsullied"
"prayer, God has favored"
"priceless, beyond price"
"vine, to bind"
"feminine form of Daniel"
Similar sound: These names share phonetic patterns with Nina — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew/Slavic origins, giving them the same cultural heritage as Nina.
Rhythm: Nina is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.