Dahlia sits next to 4 phonetic neighbors — Delia, Dalia, and Lydia are the closest matches by sound. Most share Dahlia's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"flower named for botanist Anders Dahl"
"flower name"
"God will add; God increases"
"noble, exalted"
"concord, unity of parts"
"of gold, golden-haired"
"divine strength"
"lily flower"
"jade stone, precious green gemstone"
"ugly head (from ceann donn)"
"pledged to God"
"symbol of peace and wisdom"
"high chief, heavenly chief"
"king's meadow"
"chief, royalty"
"flowing body of water"
"vine, to bind"
"rose flower, the plant"
"goodness, mother"
"poppy flower"
Similar sound: These names share phonetic patterns with Dahlia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Swedish/Neo-Latin botanical origins, giving them the same cultural heritage as Dahlia.
Rhythm: Dahlia is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.