thosebizzareserpents:

Don’t  forget that Cedrella Weasley (nee Black), middle sister of Callidora Longbottom and Charis Crouch, who married blood-traitor Septimus Weasley,  raised Gryffindors Arthur Weasley, Bilius Weasley,

and Lionel Weasley the grandmother of the siblings children, was a Slytherin.

Don’t forget that Lucretia Prewett (nee Black), older sister of Orion Black, who was the father of Sirius and Regulus Black, married Ignatius Prewett was the aunt of Molly, Gideon and Fabian Prewett, was a Slytherin.