Thelonious sits next to 4 phonetic neighbors — Cornelius, Aurelius, and Cassius are the closest matches by sound. Most share Thelonious's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"lord, ruler"
"little swift one, bright and pleasant"
"messenger of God"
"son of good fortune"
"from the forest, of wood"
"bear"
"victory of the people"
"God appears (Theo-phania)"
"sunlike, radiant"
"my joy, my song"
"God is gracious"
"village of the Danes"
"variant of Tyson"
"noble defender (speculative African root)"
"sword (card suit origin)"
"divine stream (Jor = stream + El = God)"
"gift of God"
"hare's meadow, woodland clearing"
"marshy meadow"
"spear wood (ash was used for spears)"
"bold undertaking; risky journey"
Similar sound: These names share phonetic patterns with Thelonious — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic/Latin origins, giving them the same cultural heritage as Thelonious.
Rhythm: Thelonious is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.