What does Theta mean?
Theta /the-ta/ [2 sylls.] as a girls' name is of Old German origin, and the meaning of the name Theta is "people". Theta is a variant transcription of Theda (Old German): from "theod". Compare last name Thota.
How popular is Theta?
Theta is an uncommonly occurring first name for women. Theta is an equally unusual surname for both adults and children. (2000 U.S. Census)
Shown below is a comparison of the popularity of Theta and corresponding names. The only prominent varying form of Theta (outside Top 1000) is Theda. Variants like Thida are seldom used. This girl name was at the top of its popularity during 1920-1929 (usage of 0.515%) and has become significantly less widespread since, with Theda becoming less fashionable. (Top 1000 Birth Names Records, 2014)