Bryston sits next to 5 phonetic neighbors — Bryson, Triston, and Preston are the closest matches by sound. Most share Bryston's Gaulish via Old English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of Brice"
"free man"
"son of Aodh (fire)"
"sacred name"
"warrior, gift of God"
"he who holds firm the good"
"army ruler, commander"
"one who follows at the heel"
"beautiful; fair"
"one of the Franks (a Germanic tribe)"
"son of Morris/Maurice"
"ruler of the people"
"son of John (God is gracious)"
"healer"
"home ruler"
"of the night"
"guardian, protector (by extension)"
"gray, silver-haired"
"all right, in harmony"
"holy one (of Dewi/David)"
"hunting grounds"
Similar sound: These names share phonetic patterns with Bryston — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Gaulish via Old English origins, giving them the same cultural heritage as Bryston.
Rhythm: Bryston is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.