Yes.
Hotspot >> (wifi signal) >>Wireless Bridege---(ethernet cable)--]WAN port of router.
If router is wireless I would connect all wifi devices to it over the hotspot as this way you will be much better proteted on the internet. You will want to make sure your router and hotspot are using different wifi channels. The 3 primary usable ones are 1,6,and 11, so if the hotspot uses 11, set your router to 1 or 6 (whichever one is least used by your nieghbors). You can download a program called inssider for windows or android/iOS has some good wifi analayzer apps as well that can scan for wifi signals and tell you their channel and signal stregnth.