Penelope Scotland Disick is your niece because she is the daughter of your sister Kourtney Kardashian and Scott Disick ex-your brother-in-law and she is the sister of Mason and Rocky and Reign and Landon and Alabama and Atiana and her aunts are you and Kim Kardashian and Khloé Kardashian and Kendall Jenner and Kylie Jenner and her only uncle is Rob Kardashian and the grandson of Kris Jenner and her cousins are North West and Saint West and Chicago West and Psalm West and True Thompson and Tatum Thompson and Dream Kardashian and Stormi Webster and Aire Webster