There have been a total of sixteen (16) popes named Gregory. Gregory I, 590-604, the second pope (of the total of three) to be called 'The Great.' The last Gregory was Gregory XVI, 1831-1846.
The Catholic Church believes that each Pope is selected by the Holy Spirit. We do not really know why the Holy Spirit chooses a particular person.
There have been 16 Popes named Gregory.
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