Elmer sits next to 4 phonetic neighbors — Elma, Elma, and Alma are the closest matches by sound. Most share Elmer's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Noble and famous"
"numbness, the narcissus plant"
"battle horn"
"washed, cleansed; or variant of Lavinia"
"gentle, mild"
"the white, noble one"
"wonderful, to be admired"
"from Leicester; possibly heavenly"
"prosperous friend"
"champion"
"shepherd, friend"
"variant of Chloris, goddess of flowers"
"flowing, moving freely"
"of Rome, Roman woman"
"meadow on a ledge"
"bright, famous"
"settlement of the Britons"
Similar sound: These names share phonetic patterns with Elmer — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Elmer.
Rhythm: Elmer is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.