Immense social, political, economic and religious changes had been occurring during the last two centuries of the Roman world. The Emperor Constantine [ 324 AD onward ] saw to it that the Christian religion was legal in the empire, and began a series of changes that were to place the "State" and the "Church" together in a cauldron that would forever change the western world as we have come to know it.
An intimate friend of Constantine was a Greek Bishop named Eusebius. (263 AD - 339 AD) He wrote a history of the Christian Church, leaving a personal account of this period in time.
His work, translated by G.A. Williamson, and published 1965, by Dorset Press, is a very readable version. It provides the reader a clear insight into the mind of Eusebius who has been called the "Christian Herodotus".
For those who need an understanding of the religious beliefs that were to bring the name of "JOHN" into common usage among the people of the world, this would be it. It was the name "JOHN" that was to become the surname "JONES". It is a source of fascinating information for the genealogist and time traveler.