Unlike Qatar Visit visa is allowed to blood relations even not to brother or sister. One can sponsor to their families only vertically not horizontally in relation.
Umrah visa is i think valid for 15 days only. and u can visit Jeddah as there is no airport in Makkah. So for umrah you have to take flights from Jeddah. but the person is allowed to visit Makkah and Madina only besides Jeddah. if you have nay relative in Jeddah then it will easy for you to stay in Jeddah.