Hi, unfortunately I can't give you much more information on the background of that name, but just wanted to mention that my family is also romanian and I also know lots of other people from romania that are carrying this name.
What I was told is that the name is of italien origin, written "giorma", and also pronounced differently.
As for the nordic idea: People often ask me if I'm from finland or sweden - which is of course because of my looks ;-). Maybe this deduction is based on the fact that one of the most known inhabitants there is Jorma Ollila, the CEO of Nokia. Just a guess.