Terrell sits next to 4 phonetic neighbors — Terrence, Darrell, and Tyrell are the closest matches by sound. Most share Terrell's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"thunder ruler, powerful"
"immortality, eternal life (symbolic)"
"place of lime trees"
"little Aodh (fire deity)"
"spear, marksman"
"lord, father, sovereign"
"who is like God (via Michael)"
"land power, territorial lord"
"warrior, battle"
"from Kent, the English county"
"son of the earth"
"high settlement or estate"
"descendant of Riagán"
"hero, protector (fictional)"
"life-giving"
"craftsman who works with metal"
"light, happiness (Ko in Japanese)"
"brave spear, strong with a spear"
"God is my strength, God will strengthen"
"my God is help"
"modern invented name"
Similar sound: These names share phonetic patterns with Terrell — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French / Germanic origins, giving them the same cultural heritage as Terrell.
Rhythm: Terrell is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.