How Many People Are Named Thelonius?
people named Thelonius are alive in the United States today (estimate)
About 1 in 17,089,242 people in the US has this name
Based on 21 babies named Thelonius in Social Security records from 1972 to 2013, and the share of each birth year still alive in 2025.
Popularity Rank
💎💎 Very Rare
Population Percentage
Of US population
Peak Year
6 births
Trend
Last year given
📖 Name Origin & Meaning
Meaning:
Latinized form of Tielo (see TILO). A famous bearer was jazz musician Thelonious Monk (1917-1982).
Source of the meaning, origin, pronunciation and related names: Behind the Name.
⚧ Gender Distribution
All of the babies given the name Thelonius in the records were boys.
👥 Age Distribution
The average person named Thelonius alive today is about 27 years old, and 80% are under 30.
📈 Popularity Over Time
Thelonius first appears in the records in 1972 and was given most often in 2006, to 6 babies. The last year it was given to at least 5 babies of one sex was 2013.
Babies given the name each year, 1972 to 2013
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