Claude Beauchamp is the only son and the heir of the late Baron Amandine. Claude had an older sister, Amelie, who died in mid-1730s, and has a younger sister Cecile. He inherited his father's estate, Trois Flèches, near Compiègne in France, where he now lives with Cecile and her husband Percy. Henry Beauchamp (Claire's father), was he the one who passed her the TT gene?
Let' talk some more about Claire's genealogy and family names.
Fergus' middle name is Claudel, just like the Baron's (Claude), and Claire's family coat of arms has martlets on it, the Beauchamp family in the 18th century also has martlets as a family seal. Aaand Claire's middle name is Elizabeth, Amelie's (Fergus' supposed mother) middle name is Elise (which is short for Elizabeth). There's also the title Amandine that's very similar to Amanda's name. So it looks like both Claire and Fergus are somehow connected to that family.
Germain, Fergus first son has the same name as mesieur le Compte de Saint Germain.
Also, we know your love for historical figures and here is what Wikipedia says about le Compte.
The Count of St. Germain (French: Comte de Saint Germain; French pronunciation: [kɔ̃t də sɛ̃ ʒɛʁmɛ̃]; c. 1691 or 1712 – 27 February 1784)[3] whose real name and origins remain unknown, was a European adventurer who had interests and achievements in science, alchemy, philosophy, and the arts. He rose to prominence in the European high society of the mid-18th century due to his works and interests. He associated himself with some of the top contemporary figures, including Casanova, Voltaire and Mozart.
He is said to have made far-fetched claims (such as being 500 years old),[5] leading Voltaire to dub him "the Wonderman", and that "he is a man who does not die , and who knows everything.
Also, in the side novel "The space between" Joan is escorted to Paris by recently-widowed Michael Murray. She hopes to become a nun to quieten the voices in her head and manage the strange gift of Sight she has. Joan is dazzled by Paris and eager to enter the Convent of des Anges. She quickly settles into life as a postulant, though the voices continue.

Not long after her arrival, she is kidnapped by the Comte St. Germain, who believes her to be Claire's daughter and takes her to an underground cavern to see if she, like the Comte (and Claire) can "hear" the stones. Joan does not hear anything, suggesting that despite her powers, she is not a time traveler. Master Raymond arrives in the cavern and states that Joan is not "one of his." At this point, Michael arrives to rescue Joan. The pair watch in disbelief as Master Raymond and the Comte St. Germain travel into the past, disappearing into thin air in front of their eyes..
So... there is another stone circle, time travel space in a cavern in France....

"Они на самом деле почерпнули общую идею от меня. Во время беседы с Мэттом Робертсом я упомянула, что если бы я написала второй графический роман, я бы показала, что на самом деле произошло после предполагаемой смерти Фейт в больнице Ангелов. И как и почему мэтр Раймон тайно реанимировал и воспитывал ребенка, но не смог вернуться с ней до того, как Клэр и Джейми покинули Францию. Сценаристам эта идея понравилась и они воплотили ее"

Вот так вот. Фейт все это время была жива, ее воспитывал мастер Рэймонд. Джейн и Фанни - внучки Джейми и Клэр, а Уильям спал со своей племянницей. Прям чужестранная Игра Престолов

да. это мерзко, возможно даже более мерзко чем все прочие извращения в этой истории

если как вы говорите ее растит Мастер Реймонд то наверное он услышал песню и пел ее Фейт

хотя я конечно против нормализации всяких извращений и безнравственности. мне так не приятно все это смотреть, в любых сериалах. многие стала бросать из-за этого

Надо было закончить 7 сезон, тем что они возвращаются в Ридж и все. А не придумывать всякое про других персонажей.