Thelonious Sphere Monk was an American jazz pianist and composer. He had a unique improvisational style and made numerous contributions to the standard jazz repertoire, including "'Round Midnight", "Blue Monk", "Straight, No Chaser", "Ruby, My Dear", "In Walked Bud", and "Well, You Needn't".

Is Thelonious a Greek name?

The name Thelonious is primarily a male name of Dutch origin that means People. Latinisation of Tielo.

What does Thelonious mean in Greek?

Thelonious- Powerful ruler of the people., thə-LAHN-i-əs, Germanic on BellyBallot.