Max was originally Marble, but I didn't like it. Alfie hadn't been named as his mums owner thought he was a girl!
My childhood boy Tigger was called Ambrose when we got him from the rescue centre, named after the woman who had found him and his littermates dumped in a gravel pit (Tigger was the only survivor). Absolutely gorgeous cat, lived to about 17 and was the light of my life
Pickles was a feral kitten, born in a barn. We got her when her mum was run over. She didn't have a name before we got her.
Ginger is a, funnily enough, ginger tabby cat that turned up on our doorstop about 15 years ago. He was once owned as he had a collar, but the collar was so deeply ingrained in his neck that he was obviously a stray (he's had a scar ever since, no fur will grow around his neck there). No idea therefore what his name was, but noisy little toad would be appropriate!
Oscar is my Dads pedigree persian, the name on his papers is Billy the Kid. No idea where the name Oscar came from!