I am just wondering about the etymology of dwags. In addition to Dwags-po, name of a place in Tibet, we have not many words ending in dwags. Here are a few examples:
1. ri dwags
2. lung dwags (dGe.chos-2: 101)
3. g.yung dwags
4. yi dwags
5. bla dwags
6. la dwags
Could it be that “x + dwags” means “that which abides in x”?