This is an older file of mine (hence the odd formatting), where I attempted to unearth the names of all the 101 Dalmatians. As you can see, I got pretty darn far. These names are all canon (although which of the pups make up the fifteen is debatable, I suppose).
I should also point out that several false names often pop up on the lists that currently exist on the net, such as "Perdy", "Thunder" & "Queenie". These are names from the film that refer to Perdita, Thunderbolt, and a cow, respectively.
101 Dalmatians is copyright Dodie Smith and Disney.