Honestly, nothing makiies me crazy quite like supposedly serious genealogists taking data straight from books like Holy Blood, Holy Grail and others of that ilk that should be just entertainment. I often think I should take on a systematic study and create a website devoted to the subject. Not going to happen, so I’m happy to find this article by Jason Colavito.
“The claim that the Knights Templar are the secret guardians of the Holy Grail, identified as the Holy Bloodline formed by the children of Jesus Christ and Mary Magdalene, is of very recent vintage, but due to its promotion in Dan Brown’s Da Vinci Code (2003) and on TV shows like America Unearthed (2012-present), the idea, first proposed in 1982, has become an industry, gradually subsuming other medieval “mysteries” of equally dubious provenance, particularly the claim that a Scottish noble named Henry Sinclair discovered America in 1398. There is not one single authentic medieval document that (a) confirms a Holy Bloodline of Jesus, (b) links Henry Sinclair to the Knights Templar, or (c) documents any voyage by Henry Sinclair to anywhere outside of Europe. How the myth formed is an astonishing story on its own.“
- Colavito, Jason. “The Templars, the Holy Grail, & Henry Sinclair.” Jason Colavito <jasoncolavito.lcom>. 2015. Retrieved Oct. 29, 2019.
- Swanstrom, Justin. “Holy Grail.” Swan Knight <yellacatranch.com>, Jan. 1, 2000. Retrieved Oct. 29, 2019.
Revised to update link.