I am reading a novel written by Antony Trollope in 1858. Several characters have their names shortened - and what about Little Women? Meg, Jo, Amy and Beth, three of the four names are dimunitives.
The Queen was called Lilibet in the family, after how she first pronounced her own name. then of course there is Good Queen Bess.
No name is so short it cannot be shortened (in which case it usually ends up longer) and the fashion for how a name is shortened varies from generation to generation.
Cladiaclaws that just gives your age away. Most Andys and their parents have no memory of Andy Pandy.
Another Tired Kicking For The Sick And Disabled By Rishi