Mrs Prewett was a pure-blood witch, the wife of Mr Prewett, and the mother of Gideon, Fabian and Molly Prewett (later Weasley). She was the maternal grandmother of the Weasley children and great grandmother of Albus, James and Lily Potter, Victoire, Dominique, Louis, Molly, Lucy, Roxanne, and Fred Weasley, as well as Rose and Hugo Granger-Weasley. She was also the mother-in-law of Arthur Weasley. She could also be the niece of Muriel. She may or may not have had a big nose.