Its a norwegian name used for intelligent people or people that loves BMW, everyone else knows that BMW is bad, but this creature that spawns in Norway thinks it is good. His friends are usually idiots but he still loves them, if u ever meet a Jon Olav you are the luckiest guy ever because he is a cute boy.
"Hey did you meet my new friend he is into bmw"
"Dude he has to be a Jon Olav"