Description:

I checked many sources, but found nothing.

Krishnas a big deal! Hes a powerful god, and many see his avatar as himself. Radha, his beloved, is also important. Big festivals like Janmashtami (his birthday bash!) and Holi (a crazy color party often tied to him) celebrate this name.

There arent common shortened versions found in usual name lists or old records. Its possible family traditions might have created unique versions, but those arent usually written down.