Board Thread:The Reference Desk/@comment-1312012-20160413121354/@comment-10983683-20160413204154

Off the top of my head, "John" in The Abominable Snowmen. He's just John in the episode, but in two different novelisations, he's named "Mackay" and "Angus Mackay". Then, a novel gave his full name as "John Angus Mackay".

I'm sure there are other examples, but I can't think of them right now.