Terrion sits next to 4 phonetic neighbors — Terrance, Terrell, and Marion are the closest matches by sound. Most share Terrion's Latin-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"derived from Terentius, possibly tender or gracious"
"gift of God"
"variant of Kashton (Kash + ton)"
"happy, fortunate, blessed"
"son of the devotee of Saint Faolán"
"little warrior"
"pledge or oath"
"land of Eoghan (Irish)"
"slave of the Lord"
"victory of the people"
"Creative African American name; strong and distinctive"
"of Devon, creative modern coinage"
"son of Judd, son of the praised one"
"son of the supplanter"
"bright-headed"
"possibly twin (via Tavish connection)"
"heel, ankle"
"from 'deaglán', possibly 'good man'"
"a days work or travel"
"new house"
Similar sound: These names share phonetic patterns with Terrion — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Terrion.
Rhythm: Terrion is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.