The term 'Some Sisters' can refer to aunts, zetas, nuns, and WEIRD sisters. Aunts are female relatives of one's parents, usually the siblings of one's mother or father. Zetas are members of the sorority Zeta Tau Alpha, which was founded in 1898 at the State Female Normal School in Farmville, Virginia. Nuns are members of a religious order who take vows of poverty, chastity, and obedience. WEIRD Sisters are characters from William Shakespeare's play Macbeth, who are supernatural beings that prophesy Macbeth's fate.