Proceedings for the administration of estates of two deceased persons, who died intestate, may be joined and united in one proceeding, where the estate or estates left by one or both of such deceased persons has been or is to be received from the other of such deceased persons, immediately or remotely, and no probate or administration proceedings have been had or commenced upon the estate of either of such deceased persons, or where two persons died seized of undivided interests in property, real or personal, and no probate or administration proceedings have been had or commenced on the estate of either, and one or more persons are heirs of both such deceased persons. The court may grant letters of administration upon such estates and they may be administered as one proceeding: Provided, That in all cases herein mentioned the court granting such letters has jurisdiction of each proceeding so joined and united.