One that creates, founds, or originates
The seat at the head of the table is always saved for the patriarch of the family.
In the West the only patriarch in the fully developed sense of the Eastern Church has been the bishop of Rome, who is patriarch as well as pope.
After his father died, Thomas stepped up to the role of family patriarch.
In Ethiopia, too, there were Catholici with less extensive powers, subject to the patriarch of Alexandria.
The patriarch of each Hebrew tribe was written about in the Old Testament.