Meaning and name origin
Oratio \o-ra-tio\ as a boy's name is of Latin and Italian origin, and the meaning of Oratio is "prayer". Oratio is a variant of Horace (Latin): from Horatius, a Roman family clan name. Also a variant of Orazio (Italian): may also be a variant of Horace, an ancient Latin clan name.
Oratio is not a popular first name for males and an equally uncommon surname or last name for all people (2000 U.S. Census).
Displayed below is a comparison of the popularity of the boy name Oratio and its source forms. The only popular variation form ranked in the Top 1000/100 is Horace. (2014 statistics).