Berkeley sits next to 3 phonetic neighbors — Barclay, Berkley, and Brinkley are the closest matches by sound. Most share Berkeley's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"birch tree clearing"
"initials: various combinations (Andrew Charles, Anthony Cole, etc.)"
"God is my oath"
"tax collector, rent farmer"
"one who is loved"
"divinely favored"
"Dealer in cloth and fabrics, cloth merchant"
"weapon, mace bearer"
Similar sound: These names share phonetic patterns with Berkeley — 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 Berkeley.
Rhythm: Berkeley is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.