from wikipedia (I know… not the most reliable source, but nevertheless…)
Seventh-day Adventist Ellen G. White taught that the Waldenses were preservers of biblical truth during the so-called Great Apostasy of the Roman Catholic Church.[34] She believed that the Waldenses kept the seventh-day Sabbath, engaged in widespread missionary activity, and “planted the seeds of the Reformation” in Europe.[35][36] Based on the Catechism of the Waldenses they believed in keeping the ten commandments.[37]
I believe they tie this into the Revelation 12 prophecy (which SDA’s interpret as the “truth” having to hide in the desert for 1260 days Rev 12:6… I have now learned that the Catholics apply this to Mary, and frankly it makes a lot more sense that it’s Mary). The SDA use Daniel and Revelation together to “unlock” secrets about the last days and have a formula down to figure how each day actually equals so many years etc… which is how they got 1844. It’s a long shot, but how many people in the world buy it…LOTS and LOTS.
Here is catholic research on the Waldenses:
philvaz.com/apologetics/num3.htm
Who Were the Waldenses? Early Evangelicals?
Some Fundamentalists and Evangelicals like to claim there were many “Bible only” Christians who existed throughout the history of the Church who did not belong to the visible “institutional” Roman Catholic (or Orthodox) Church and in fact repudiated her sacraments and denied her established doctrines. Depending on who is making this claim, these non-Catholic Christians are supposed to be early Evangelicals, Baptists, Plymouth Brethren, Seventh-day Adventists, or “King James Only” believers before the sixteenth-century Protestants, and some go on to claim they can even be traced back to the apostles themselves through a succession of groups who held doctrines consistent with Baptist distinctives, such as Sola Scriptura and believer’s baptism. This claim is commonly known as the “baptist successionism” thesis.
But are these claims true? Is there any evidence for such claims? What are the real historical facts?
WHAT ABOUT THE WALDENSES?
The same period of Medieval history that saw the rise and suppression of the Cathars witnessed the emergence of a very different religious movement known as the Waldenses. In contrast to the Cathars, whose dualistic world- and life-view placed them in radical opposition to historic Christianity, the Waldenses began as a reform movement within the Roman Catholic Church and never imbibed Manichaean teachings.
PETER WALDO : Founder of the Waldenses
The sect owed its origin to Peter Waldo (d. 1216), known in France as Valdes. Little is known about Waldo’s life, but it is clear that he was a prosperous merchant in Lyons who suddenly divested himself of his wealth in order to pursue a life of “evangelical perfection,” which, to medieval Catholics, meant following the example of Christ, including the Savior’s poverty.
WALDENSES BEFORE WALDO : Do They Exist?
Although there is unanimous agreement among reputable scholars that the Waldenses originated with the work of Waldo, and despite the fact that modern Waldense historians themselves concur with this opinion, successionists of various affiliations have inducted them into the line of “true” churches which have maintained Gospel purity since New Testament times. As one might expect, the Waldenses have been claimed as Baptists (and Plymouth Brethren by E.H. Broadbent, and Seventh-day Adventists by Ellen G. White, and others).
Those who attempt to establish a pedigree for the Waldenses anterior to Waldo himself often refer to the work of Sir Samuel Morland, a 17th-century English author and diplomat who claimed to have found evidence that verifies the great antiquity of the sect. [4] Morland reproduced documents supposedly from the year 1120, which, he said, show that the Waldenses (French, -Vaudois-) had the scriptures for about forty years prior to the translation that Waldo obtained.
The documents in question, however, show the Bible divided into chapters, and such divisions did not appear before about 1250 or later. [5] The confession of faith produced by Morland makes it appear that the Waldenses held to a strongly Protestant-evangelical theology centuries before Luther. It is now known that this document originated in the 16th century. It contains teachings of Martin Bucer, reformer of Strasbourg, copied almost verbatim. [6]
Despite their usual aversion to Roman Catholic sources, successionists have not hesitated to cite a remark by Reinerius Saccho that the Waldenses movement is ancient,
“for some SAY that it has existed from the time of Sylvester, some from the time of the apostles.”
It is clear, however, that Reinerius intended only to report a belief held mistakenly by some people. The inquisitor did not accept the legend of Waldense antiquity himself. [7]
No evidence has been found which reveals a Waldense Church prior to Waldo, and neither Waldo himself nor modern Waldense historians ever asserted such claims. Scholars hostile to the Roman Catholic Church have concurred with historians of that body in affirming Waldo as founder of the sect that still bears his name. [8]
A fitting commentary on the pursuit of pedigree has been provided by Harold S. Bender, a leading Mennonite scholar of the 20th century:
“The tempting and romantic theory of apostolic succession from the apostles down to the Anabaptists through successive Old Evangelical groups, which has been very popular with those among the Mennonites and Baptists who feel the need of such an apostolic succession, always includes the Waldenses as the last link before the Anabaptists. It has…no basis in fact.” [9]