Fun fact: the person who sang the original Fireman Sam theme in the 80s was called Maldwyn.
On a separate note, it really pisses me off when people go 'eurrrgh NO' at a name when they've no idea about its provenance. It's not a massive leap to go: oh, Maldwyn, Welsh name, I'm probably not qualified to comment. I once saw someone taking the piss out of 'Kacper' as a spelling - they had no idea it was Polish for Casper.