Dulcia sits next to 3 phonetic neighbors — Dulcie, Lucia, and Cecilia are the closest matches by sound. Most share Dulcia's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sweet"
"divine, heavenly"
"favored by the gods"
"noble, the bright one"
"grace"
"friend of horses"
"beloved, wished-for child"
"battle to the death"
"lion of God"
"brilliance, radiance, splendor"
"eagle nobility"
Similar sound: These names share phonetic patterns with Dulcia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Dulcia.
Rhythm: Dulcia is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.