At my school, some of the boys acquired nicknames that stuck with them until they left.
Some were rather obvious: ‘Wilf’ was derived from the first name William, while ‘Gubby’ was shortened from the surname Gilbertson.
But some were a little stranger. One boy was dubbed ‘Beefy’, not for being fat, but after an incident that isn’t necessary to repeat. And I never did find out how Adam started to be called ‘Cuba’
A nickname in a story can be a powerful way of telling the reader about the personality of the character or the type of friends that surround them. The best nicknames work with mutual consent, but not necessarily consent with the nicknamed party.
In the William Golding novel Lord of the Flies, Piggy says early on that he doesn’t want to be called Piggy. Yet nobody had thought of calling him this until he mentioned it, then everyone started doing it.
When just one person has another name for a character, it tells us as much about the person who uses that name as the person it applies to.
Perhaps it’s a close bond between the two. In the crime series NCIS, Ducky nearly always calls Gibbs by his first name ‘Jethro’ because they’re old friends.
Conversely, I’ve witnessed the opposite relationship. In a previous job, one colleague accidentally referred to another as ‘Declan’ instead of Brendan. For the next three years, he continued to use ‘Declan’, seemingly oblivious that none of the rest of us found it funny, least of all Brendan.