Terdell sits next to 4 phonetic neighbors — Terrell, Darnell, and Cordell are the closest matches by sound. Most share Terdell's Norman French via African-American English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"variant of Terrell; earth puller"
"settlement by the brushwood"
"variant of John"
"name of God"
"modern invented name"
"security token"
"bold confidence, striking presence"
"from Airelle (place in Normandy, France)"
"light of the Almighty, Shaddai is light"
"little red one"
"ruler, king (from -rick suffix)"
"bright, splendid"
"Descendant of the cloud; son of Neil"
"of Mars, warlike"
"symbol of wisdom and knowledge"
"son, born of"
"courage, bravery"
"western settlement"
"from the ash tree grove"
Similar sound: These names share phonetic patterns with Terdell — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Norman French via African-American English origins, giving them the same cultural heritage as Terdell.
Rhythm: Terdell is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.