Thelonius

One of the coolest of names, thanks to legendary jazz pianist Thelonious Sphere Monk, who inherited it from his father. It has been used very sparingly since the 1960s--just a sprinkling of baby boys receive the name each year. Monk's middle name Sphere is pretty unique too--a cousin of Cosmos and Cosmo. Some other jazz names to consider: Bix, Ellington, Ella, Etta, Mingus, Dexter and Calloway. :

Pronounced thuh-LOH-nee-us.

As of October 2026, Thelonius ranked #13854 in US births in 2013 SSA, peaked at #5678 in 1972.