This makes me want to set up a tailoring business on the side of the road and call it "Highway Robery"

Yep, in Albanian: Rrobe, means "Cloth". Same origin. It means that 'rober' came from the meaning of 'cloth taker'.

Actually the opposite - the root refers to loot and "robbery" is the direct development from it. Robes the clothing are named after robbery the act of generic theft, not the other way around.