What's the difference between i.e. and e.g.?
masc. proper name, introduced by the Normans, from Old French Giralt, from Old High German Gerwald, "spear-wielder," from Proto-Germanic *girald, from *ger "spear" + base of waltan "to rule" (cf. Old English wealdan). The name often was confused with Gerard.
["Gerald: An Exceptional Lazy Functional Programming Language", A.C. Reeves et al, in Functional Programming, Glasgow 1989, K. Davis et al eds, Springer 1990].