What's the difference between i.e. and e.g.?
masc. proper name, from Old North French form of Old High German Hrodberht "bright-fame, bright with glory," from hrod- "fame, glory," from Proto-Germanic *hrothi-, + -berht "bright" (see Albert). The name of William the Conqueror's rebellious oldest son. "It was introduced by Normans during the reign of Edward the Confessor and became very popular" ["Dictionary of English Surnames"].