In the first season of Blake's Seven (Blakes Seven? Blake's 7? Blakes 7?), the titular seven are:
- (Roj) Blake
- (Kerr) Avon
- Jenna (Stannis)
- Vila (Restal)
- (Olag) Gan
- Cally
- Zen
Apart from Zen and apparently Cally, neither of whom is human, all the characters have two names, but some of them are referred to by first name and some by surname. Why is this? Is there some coded social signalling going on? Admittedly Avon is dislikeable enough (in-universe) that maybe nobody would want to be familiar with him, but the same couldn't be said for Gan.