Infortunately for me and likely the majority, there doesn't seem to be any hard documentation (other than a land purchase, marriage, or will) on the immigrant Larrabee forefathers: be it their parents, siblings, and birthplace etc. Everthing I obtained as an amateur geneologist was generally hearsay from the multiple ancestral websites that provide family related information (paid subscribtions ended long ago).
It would likely take a professional genealogist (likely for hire) to truly research and obtain hard documentation in America (I'm sure its out), and overseas (France and other countries around the world that the Larrabee's emigrated to via the multiple wars of relgion) - to "prove the line" as Huguenot to the satisfaction of the Huguenot Society and alike.
I was unable to make contact with a James H. Leatherbee, a member of the Connecticut Society of Genealogists (they have a website). He too descibes himself within his online bio that he is a decendant of our immigrant forefather Stephen Larrabee. I thought he might be a great contact for hard documentation on the Larrabee (Leatherbee) surnanme - to include our Huguenot heritage. If he is no longer available, maybe someone else within the Society might assist with hard documentation. Especially as Greenfield Larrabee who died Oct 1661(likely related to Stephen who died Sep 1676 and William who died Sep 1692 of MA/MA) was the first immigrant to America in settling in Old Saybrook, CT - with many decendants continuing to settle the surrounding area, to include the founding of Norwich, CT.
Lastly, my genealogy project research days are pretty much behind me since an eye injury a few years ago. My reading and typing skills have diminished since. I'm now trying to connect with new found cousins late in life to ensure family genealogy information is shared and hopefully passed to future generations. Its my hope that they and others will continue to stay active and hopefully one day rightfully "prove the line" nationaly and internationaly that the Larrabee family is of Huguenot heritage. The Larrabee forefathers deserve no less, especially in light of what they endured during those troubled times - many losing their homes & properties in France, as well as their lives.
My appreciation and best of luck to all that take up this worthy quest.