What's the difference between i.e. and e.g.?
constellation, late Old English, from Latin gemini (plural of adjective geminus) "twins" (see geminate). The twins are Castor and Pollux. Meaning "a person born under the sign of Gemini" is recorded from 1894. As an oath, from 1660s (also found in Dutch and German), perhaps a corruption of Jesu (cf. jiminy).