Kilometers = km
The shortened name for oxygen is O2.
Jon is most often the shortened name for the proper name Jonathan. However, it can be a shortened name for some other proper names including John and Jonas.
it actually is shortened from Christina and it means ' christs follower'
Christopher Katherine shortened to Kitty shortened to Kit
Scotland can't be abbreviated, But the name of the Scottish people can be shortened to Scots.
bang
Allfie.
bra
Yes, a shortened version of your name is called a nickname. An example of a nickname for the name Jessica is Jess. There is also a pet name which doesn't have to be a shortened version of your name. A pet name can be a nickname like Jess or it can be something like "kitty" for the name Olivia.
It is Rio.
Prose
Sure, why not?