Claim: Humphry Marshall was a Quaker (a historically Christian denomination known formally as the Religious Society of Friends or Friends Church) and was cousins with John and William Bartram.
Evidence: Like many early American botanists, he was a Quaker. He was the cousin of botanists John Bartram and William Bartram. Quakers, also called Friends, belong to a historically Christian denomination known formally as the Religious Society of Friends or Friends Church.