Gregory, of Latin origin, means 'vigilant' or 'watchful'. It was popularized during the Middle Ages via St Gregory the Great, a pope known for his extensive literary works and reform efforts in the 6th century. The name has been associated with learning and wisdom throughout history.
"From 1956 to 1969, Gregory was a popular name, with over 50 babies named Gregory born each year for eight years straight. The peak popularity came in 1964 and 1965 with 8 and 7 births respectively."