Right of Survivorship

 The right of survivorship is an attribute of several types of joint ownership of property, most notably joint tenancy and tenancy in common.  When jointly owned property includes a right of survivorship, the surviving owner automatically absorbs a dying owner's share of the property.  Thus if A and B jointly own a house with a right of survivorship, and B dies, A becomes the sole owner of the house, despite any contrary intent in B's will.