Elgin sits next to 5 phonetic neighbors — Elgin, Elgin, and Elgin (usually male) are the closest matches by sound. Most share Elgin's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"little Ireland (historical settlement)"
"elf friend"
"resolute protector"
"Verse; poetic expression; creative spirit"
"bright sea"
"little faith"
"from the green woodland clearing"
"what is to be"
"faithful, honest, genuine"
Similar sound: These names share phonetic patterns with Elgin — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish Gaelic origins, giving them the same cultural heritage as Elgin.
Rhythm: Elgin is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.