Can family members residing nearby us be added to our membership account?

You can add 1 family member or a friend to your membership

Probably best to go straight to the source for the most solid info on to that.

Yes

Yes. I've shared a membership with family living at a different address before.

I believe you can add anyone you want to a membership, the number of people though probably depends on the level of membership.

I believe they can if you have a business account.