Decia sits next to 4 phonetic neighbors — Delia, Lucia, and Cecilia are the closest matches by sound. Most share Decia's Italian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of the Roman gens Decia"
"heavenly (folk etymology)"
"beloved"
"sensitive, perceptive"
"variant of Cerridwen (Welsh goddess of inspiration)"
"a drop of liquid shed from the eye; teardrop"
"Term of endearment; in some Slavic and African languages means fath..."
"feminine form of Anthony"
"little one (from -ita diminutive suffix)"
"land of Eoghan (Owen)"
Similar sound: These names share phonetic patterns with Decia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Decia.
Rhythm: Decia is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.