Tristyn sits next to 3 phonetic neighbors — Tristan, Trystan, and Tristin are the closest matches by sound. Most share Tristyn's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"noise, tumult"
"to rejoice, happy, glad"
"whole power, universal ruler"
"lion of Judah (royal, courageous)"
"powerful, keen warrior"
"warrior (via Irish Kane)"
"one of the primordial ruling gods"
"red-haired, famous"
"fame, glory (folk etymology)"
"glorious power"
"victory of the people"
"strong fighter (from bar + hard)"
"king"
"army ruler (from Harold/Harald)"
"supreme, excellent"
"one who strides, ranger, wanderer"
"consecrated, dedicated to God"
"son of Morris/Maurice"
"beloved, darling"
"famous shouter, distinguished one"
"harmony, one"
Similar sound: These names share phonetic patterns with Tristyn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Pictish/Celtic origins, giving them the same cultural heritage as Tristyn.
Rhythm: Tristyn is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.