Doug is called Doug.
Douglas when he’s been a very naughty boy…
Sometimes Doggolo / Dougolo
(the rest of this is only me – Mrs Noise would just pull ‘that’ face if she knew what I call him from time to time)
Occasionally Dougie / Doogie
When he gets excited and ‘revved’ up, he’s Doogy Rev with a nod to The Adventure Game.
That mutated over time into Douglas Revington III, no idea how or why.
More recently he’s randomly become Doogiewoogieboogieboy
Some other occasional names can’t be typed here…