Romilly sits next to 4 phonetic neighbors — Rosalie, Romilda, and Romily are the closest matches by sound. Most share Romilly's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from the Roman settlement"
"the dark one"
"black, dark"
"heavenly life, new life"
"God is gracious"
"the sweet fragrance, God is gracious"
"princess, noble one (Sara variant)"
"lake or stream (suffix)"
"life"
"sea village"
"God is my refuge, noble"
"light, torch"
"plum blossom (Mai) + waterfall/lake (Lynn)"
"Scottish pet form of Margaret"
"invented name combining Rae + la ending"
"lake, waterfall, pool"
"feminine form of Jacques (James)"
"hoped for"
"clearing in the bent grass meadow"
"friend, joy"
"modern invented combination"
Similar sound: These names share phonetic patterns with Romilly — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin via French origins, giving them the same cultural heritage as Romilly.
Rhythm: Romilly is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.