One of the funniest/oddest examples must be the Southern Railway's naming of its N15s - the King Arthurs.
I'm sure someone will know in more detail, but I think at least two were named after the same "person" - one of which was "Iseult", AKA "Lady of the Lake".
Obviously the SR Naming Committee did not know their "Le Morte d'Arthur" very well - or perhaps they did!
I also wonder if King Uther was a p*ss take made up by the Lord's good knights to describe King Arthur himself after a late Friday night's revelries
Great names though - can you imagine a young lad of 10 standing at the end of platform 11 at Waterloo before heading west behind a big green engine named "Sir Dodinas le Savage" at the head of an 11-coach train bearing the title "Atlantic Coast Express"?
Awesome! It might even have prompted me to really try harder at French, had it been me.