User:SOTO/Forum Archive/The Reference Desk/@comment-1312012-20160413121354/@comment-10983683-20160413204154
From Tardis Wiki, the free Doctor Who reference
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.