Rev. John Maverick was born to Rev. Peter Maverick, a vicar in Awliscombe, Devon in 1578. In 1595, Maverick enrolled in University of Oxford. Five years later, in 1600, he marred Mary Gye. Two of their sons, Samuel and Moses, are notable people in early Massachusetts history. In 1603, Maverick received his MA from Oxford. He was the curate for his uncle, Rev. Radford Maverick, from 1606-1614. Afterwards, he was rector of a church in Beaworthy, Devon until 1629.