Blaine sits next to 4 phonetic neighbors — Blake, Lane, and Blaze are the closest matches by sound. Most share Blaine's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"yellow, golden"
"may God protect"
"rock hill, old hill"
"man of power on the hill"
"God has remembered, remembered by God"
"greatest town"
"the island, island dweller"
"son of the gray-haired one"
"son of Harry"
"great one, straining force"
"crowned with laurels, victorious"
"wealthy guardian"
"one who lives near the fens or marshes"
"herb garden settlement"
"of the Jordan River"
"carrier, one who bears"
"dark settlement (place name)"
"God has healed"
"small, junior"
"powerful counselor (via Ronald)"
Similar sound: These names share phonetic patterns with Blaine — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Irish/Gaelic origins, giving them the same cultural heritage as Blaine.
Rhythm: Blaine is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.