1650 or later
Thaddeus Thurkell (father)
It is rare for a single Squib to be born into a wizarding family. The fact that all seven of the Thurkell brothers were non-magical seems to indicate that there was something out of the ordinary about their case.
- Harry Potter and the Philosopher's Stone (video game) (Appears on a Famous Wizard Card)
- Harry Potter and the Chamber of Secrets (video game) (Appears on a Famous Wizard Card)
- Harry Potter and the Prisoner of Azkaban (video game) (Appears on a Famous Wizard Card)
- ↑ The wizard card of their father, Thaddeus Thurkell, shows that he was born in 1632; no indication is made of him being underage, so he had to be at least 18 - given time to account for finishing Hogwarts, a marriage and/or a 9 month pregnancy - when his wife or girlfriend had his first child; this means that 1650 is the earliest any of them can be born.