In Japanese media, butlers are stereotypically associated with the name Sebastian.
I tried this a long time ago, but neglected it, so here it is again:
In Japanese media, butlers are stereotypically associated with the name Sebastian. Possibly due to the 1960's anime adaptation of Heidi; Clara the Ill Girl's butler Sebastian was a very popular character. In Real Life Victorian times, butlers, like most servants, were traditionally examples of Only One Name (when on the job). Although lower-ranking servants were addressed by their first names (and even in Real Life frequently were assigned stock names rather than their own names), the highest ranking servants (butler, housekeeper and cook) were dignified by using their (actual) surnames. Sebastian is therefore an unlikely butler name because Sebastian is usually a personal (first) name rather than a family (last) name. Note: Characters whose first name is Sebastian don't count. They must either have the surname Sebastian or be addressed as Sebastian (and not because of First Name Basis).
Examples:Butlers actually named Sebastian