There is no canon evidence to suggest that Severus Snape, a character from J.K. Rowling’s Harry Potter series, is a descendant of Credence Barebone, a character from the Fantastic Beasts series.
Severus Snape is a wizard who was born to a Muggle father and a witch mother. He attended Hogwarts School of Witchcraft and Wizardry, where he was sorted into the house of Slytherin. After leaving Hogwarts, he became a Death Eater, but later changed his allegiance and became a spy for the Order of Phoenix. Throughout the series, he is portrayed as a complex and ambiguous character with a troubled past.
Credence Barebone, on the other hand, is a character introduced in the Fantastic Beasts series. He is an American wizard who was raised by a group of anti-wizard extremists known as the New Salem Philanthropic Society. Throughout the series, he struggles with his own identity and his connection to the dark wizard Gellert Grindelwald.
There is no direct connection between Severus Snape and Credence Barebone in the Harry Potter or Fantastic Beasts series. While both characters are important to their respective series, they exist in different time periods and locations, and their storylines do not overlap.
It is possible that fans have speculated about a potential connection between Snape and Credence, perhaps based on similarities in their character arcs or backstories. However, without any evidence from the author or the text itself, such speculation remains purely speculative.
In conclusion, there is no canon evidence to suggest that Snape is a descendant of Credence. While both characters are compelling in their own right, their stories exist in separate worlds and do not intersect. As such, any connections between them are purely speculative and should be treated as such.