Montgomery sits next to 3 phonetic neighbors — Montague, Humphrey, and Monterey are the closest matches by sound. Most share Montgomery's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Gomeric's mountain, power mountain"
"crew, group of companions"
"enlightenment, calm clarity"
"from Scotland, a Scotsman"
"yellow, golden"
"rock hill, old hill"
"son of Judd"
"modern invented name"
"new house"
"genuine, authentic, honest"
"west wind"
"tile maker, one who tiles"
"beloved of God"
"inheritance, bequest"
"who is like God"
"hill, high ground"
"of the angel, son of Angelo"
"Macks settlement"
"genuine, real, authentic"
"powerful spearman"
"God has remembered, remembered by God"
Similar sound: These names share phonetic patterns with Montgomery — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French/Germanic origins, giving them the same cultural heritage as Montgomery.
Rhythm: Montgomery is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.