Referenced in Comedity, with Garth Graham and Larom Lancaster, in issue Origins #0. The main characters decide that, since they have alliterative names, this is an invitation to become superheroes.
Occurs occasionally in The Cyantian Chronicles with "Alpha Akaelae", which an inherited title as well as the name of the original/first Alpha Akaelae. Considering that the Akaelaes are a family of anthropomorphic wolves who rule a society of anthro wolves, using "Alpha" as a title makes a lot of sense.
Bottle Blonde from Princess Pi, plus the title character if you count "Princess" as part of her name
Fräulein Frankfurtress and Liz Lolly, two of the alter egos of Winnie Goodwin from Free Spirit
Additionally, the cartoonist himself has an Alliterative Name: Peter Paltridge.
In Kevin & Kell, many examples have given names chosen to match their species-related surnames, such as Fenton Fuscus, Fiona Fennec and Tammy Tussock. Corrie was once known as "Dale Dewclaw" after reversing her given and family names while disguising herself as a wolf (an alias she was forced to keep up longer than she intended), and taking on Ralph's family name after she discovered that she was his daughter, but switched to "Corrie Dewclaw" after her friends found out she wasn't a wolf. Kevin was Kevin Kindle before he married Kell, which resulted in his family disowning him and him and his adopted daughter Lindesfarne taking on his wife's surname.
Everybody in Body World: Professor Paul Panther (though Peter Panther might suit him better), Pearl Peach, Lucy Lucido, Billy Borg, Gem Jewels, Johnny James (AKA Johnny Scarhead) and probably everyone else in Boney Borough.
In Rusty and Co., Prestige Perkins, practiced practitioner of practical prestidigitation.
Homestuck gives us Diamonds Droog and Spades Slick.