From Hull AWE
Jemmy is a short form of the forename James. There are two main types of such shortenings: they are convenient for writing, e.g. in lists; or they are essentially spoken pet-names, and thus informal. (See Conventional abbreviations for forenames.)
|Short form||Long form||Informal or written||Other short forms||Remarks|
|Jemmy||James||informal||Jem; Jim(my); Jas (written)||root of the burglar's jemmy, a crowbar or lever for breaking and entering|
- Note that any informal form may be spelled in different ways. Notably, any spelling listed that ends in '-ie' may be written with the ending '-y', and vice versa.