One Steve Limit/Radio

Inversions of, and exceptions to, a in  include:


 * Parodied in the BBC comedy Deep Trouble, which in its second series had an Alison and an Alice. But since the show is set on a submarine, everyone is usually referred to by rank and surname anyway (and Alice Barry in fact insists on being called Barry).
 * BBC comedy The Burkiss Way once featured a group of servants who were all called Rose, male and female alike, since they could only afford one name between them.
 * Parodied by the Firesign Theatre on their album Boom Dot Bust, which takes place in a town called Billville, where everybody's name is Bill.
 * Truth in Television, or rather Truth In Radio for that matter. 96 Trent FM (now known as Trent FM) had Matt Wilkinson presenting afternoons and Matt Wilkins appearing at various times of the day. Hilarity Ensues. Confusion reigns. So Matt Wilkins became Matt Marsden, on Trent FM at least. Now he's at Key 103 under his original name.
 * The Archers: Edward "Eddie" Grundy, and his second son, Edward "Ed" Grundy.