* Apparently, and before you ask, both 'butled' and 'buttled' are acceptable spellings. If you think some of the names are a little unusual, it does seem like PG was being a bit playful. Apart from 'Swordfish' and 'Cakebread', which were both aliases anyway, one does wonder at 'Blizzard', 'Chaffinch', 'Pollen' and 'Wrench'. Perhaps the most telling is Jeeves's uncle, Silversmith, since the original duties of a butler were concerning the wine cellar and the silver plate.
Just a passing thought, but would the collective noun for butlers be a Satisfaction?