What does Jordan mean?
From the River Jordan, Hebrew Yarden, derived from the root y-r-d 'to go down, descend, flow down' - describing the river's descent. Long used as a given name, originally for those baptised in or with water from the Jordan.
What does Zion mean?
From Hebrew 'Tziyyon', the name of a hill in Jerusalem that came to stand for the city, the Promised Land and a place of peace. A long-standing biblical/geographic name now popular as a given name.