Cardine sits next to 4 phonetic neighbors — Caroline, Carline, and Nadine are the closest matches by sound. Most share Cardine's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"free woman, dear one"
"defender of men"
"wanderer, exile, stranger"
"a plain, a fertile coastal plain"
"Possibly from derdriu, meaning raging woman or feared one"
"from the white village"
"from the valley"
"dear friend, beloved companion"
"anointed one"
"short form of Edith"
"old river; ancient one"
"moon goddess"
"God is gracious"
"dear one, beloved"
"creative coinage combining Mon- (advisor) and -ella (beautiful)"
"God is gracious"
Similar sound: These names share phonetic patterns with Cardine — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin/Germanic via French origins, giving them the same cultural heritage as Cardine.
Rhythm: Cardine is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.