She was the sister of Major Thomas Weir who was charged with incest and witchcraft in 1670 and was subsequently executed.
Her brother Thomas Weir was a strict Protestant whose spoken prayers earned him a reputation that attracted visitors to his home in Edinburgh.
Following his retirement in 1670, Weir fell ill and began to confess to a secret life of crime and vice.
Jane Weir confessed that their mother had been a witch and had taught her children.
She also revealed that Thomas bore the mark of the Beast on his body and that they frequently roamed the countryside in a fiery coach.