Celso \ce(l)-so\ as a boy's name is of Italian and Latin origin, and the meaning of Celso is "high, lofty". As in "Gloria in Excelsis Deo". Also a part of words for sky, like "ciel" (French) and "coelum" (Latin).
Celso has 2 variant forms: Celsius and Celsus.
Baby names that sound like Celso are Silas, Sylas and Sills.