I think it's ok. I don't like it spelled
Oren and
Oran is a country so I wouldn't use that. I actually think
Orrin is the best spelling and it doesn't sound too close to
Owen. Both
Paul and
George are good MN imo but I think I like
George the best.
I think
Oran will be the most difficult to spell correctly, the other two depend on how you pronounce it. I tend to pronounce
Orrin more like Orin than
Oren.