Nesting Attributes

Can anyone tell me how to nest attributes. I see that if I set up a category I have the option of selecting a ‘parent category.’ I really need that option for an attribute. For instance, under brand I want to be able to break that down into subsets. If I was doing cars i might want my brand to be General Motors and make that my parent company. Under that maybe Chevy, Cadillac, etc. Again I have that option for Categories just not seeing it under Attributes. I am using Woocoomerce. I am wondering if I am just not seeing it or do I need to get another plugin to make that work?