Weyward cottage
The namesake Weyward cottage, which is at the center of each story thread in Weyward, is a powerful symbol of the powerful impact the past can have on the future. Because of events that occurred at the cottage over several hundred years, Kate is forced to contend with magical, demonic forces—forces that threaten her life.
Bones
Bones are symbolic of death. Beneath the Weyward cottage, mounds of bones have been buried by sinister people who went around and killed people because they thought they were witches. Ultimately, the bones are relics of the past.
Altha
Altha is symbolic of the way that women were treated in history because of their womanhood. Altha, like many women, was accused of being a witch and subsequently treated like second-class citizens (or killed). Society was once exceptionally misogynistic; men were not subject to the same conditions that women once were.
Mass hysteria
Weyward is an allegory warning against mass hysteria. Because of a mass hysteria that was ginned up over witches, society was destroyed and rapt with paranoia. Not only that, scores of people died. That kind of mass hysteria, though, has consequences beyond deaths.