Where would Joseph Smith have gotten the idea about hereditary priests (which were the opposite of frontier priests)?

In Dr Michael Coe’s book “The Maya” we read:

“Far more is known of later Maya priests. In contrast to their Aztec counterparts, they were not celibate. Sons acquired their fathers’ offices, although some were second sons of lords” (p. 243). “During the prosperity of Mayapan, a hereditary Chief Priest resided in that city” (p. 243).
– Bruce E. Dale and Brian Dale – Joseph Smith: The World’s Greatest Guesser (A Bayesian Statistical Analysis of Positive and Negative Correspondences between the Book of Mormon and The Maya)

Bruce E. Dale and Brian Dale comment:

Both the Book of Mormon and The Maya teach clearly of hereditary priests and chief priests. This correspondence is detailed and specific. It is also unusual. Joseph Smith’s experience of frontier priests would have been of the Protestant variety, who were not celibate, but who instead were “trained for the ministry” and did not inherit their offices; or of the Catholic variety, who were celibate and therefore could not pass on their priestly office to a son. How did Joseph Smith correctly “guess” that among some of the distant ancestors of the Indians, priests were not celibate and that priestly office could descend from father to son?
– Bruce E. Dale and Brian Dale – Joseph Smith: The World’s Greatest Guesser (A Bayesian Statistical Analysis of Positive and Negative Correspondences between the Book of Mormon and The Maya)

Where would Joseph Smith have gotten this idea from?

See:

Bruce E. Dale and Brian Dale – Joseph Smith: The World’s Greatest Guesser (A Bayesian Statistical Analysis of Positive and Negative Correspondences between the Book of Mormon and The Maya)

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