Montine sits next to 3 phonetic neighbors — Monique, Maxine, and Nadine are the closest matches by sound. Most share Montine's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"mountain"
"of the Vandals"
"world-mighty"
"love, beauty (via Latin Venus)"
"possibly from Clara, meaning bright and clear"
"moon (alternative etymology)"
"silky, like floss"
"born in spring, of spring"
"wagon maker, wagoneer, carter"
"all wise, completely wise"
"brave, valiant"
"Wonder, miracle, something marvelous"
"Yahweh saves"
"from the Odra River; noble strength"
Similar sound: These names share phonetic patterns with Montine — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have French / Latin origins, giving them the same cultural heritage as Montine.
Rhythm: Montine is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.