Early writers long believed that a "Rite of Perfection" consisting of 25 degrees, the highest being the "Sublime Prince of the Royal Secret," and being the predecessor of the Scottish Rite, had been formed in Paris by a high degree council calling itself "The Council of Emperors of the East and West." The title "Rite of Perfection" first appeared in the Preface to the "Grand Constitutions of 1786," the authority for which is now known to be faulty. It is now generally accepted that this Rite of twenty-five degrees was compiled by Estienne Morin and is therefore more properly titled "The Rite of the Royal Secret," or "Morin's Rite."
Morin returned to the West Indies in 1762 or 1763, to Saint-Domingue, where, armed with his new Patent, he assumed powers to constitute lodges of all degrees, spreading the high degrees throughout the West Indies and North America. Morin stayed in Saint-Domingue until 1766 when he moved to Jamaica. At Kingston, Jamaica, in 1770, Morin created a "Grand Chapter" of his new Rite (the Grand Council of Jamaica). Morin died in 1771 and was buried in Kingston.
As told by the History gathered by the S.R. Northern Jurisdiction, I have never heard of the Southern Jurisdiction talk of him or mention him in any way as usually they refer to Pike as the Man when it comes to the 4-32 degrees of the S.R.
The Northern Jurisdiction, now headquartered in Lexington, Massachusetts, covers fifteen northeastern, middle Atlantic and Midwestern states. The Southern Jurisdiction from its Headquarters in Washington, D.C., covers the remaining thirty-five states, the District of Columbia, and the U.S. territories and possessions.
The difference in the size of the two bodies is most likely why not many of our Brethren would have heard of him. Just my opinion.