He's five of Macheath's Gang or, perhaps, six.
We get to know Robin of Bagshot when the fence Peachum puts him on his black list of useless criminals as "Robin of Bagshot, alias Gorgon, alias Bluff Bob, alias Carbuncle, alias Bob Booty" in John Gay's Beggar's Opera. Bob Booty was, of course, also a satirical nickname for Robert Walpole, the first de facto prime minister of Great Britain.
In Windows Live Hotmail, you, too, can have four aliases or five:
›› Fancy a dedicated email address for a new project, or one to throw away if it gets spam? Here's how to create a new alias address for your Windows Live Hotmail account.