Demeter sits next to 2 phonetic neighbors — Demetrius and Dimitri are the closest matches by sound. Most share Demeter's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"earth mother"
"bright, white"
"wolf counsel"
"serpent-like, winding"
"goddess, divine being"
"small, humble"
"plural of ovum (biological)"
"laurel-crowned, victorious"
"Warrior; one who experiences honor and wealth"
"bridge, fifth (born)"
"from Jerez (the wine region)"
"from the round hill"
"God will add, God will increase"
"the act of joining together, unity, oneness"
"night, dark beauty (beautiful night)"
Similar sound: These names share phonetic patterns with Demeter — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Demeter.
Rhythm: Demeter is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.