Luke Marino is your step-nephew and he is the son of Casey Jenner and Michael Marino and brother of Francesca Marino and Isabella Marino and grandson of Bruce Jenner and nephew of Burt Jenner and Brandon Jenner and Brody Jenner and and Kendall Jenner and Kylie Jenner and cousin of Eva Jenner and Bodhi Jenner and Stormi Webster and William Jenner and Goldie Brooklynn Jenner and Honey Raye Jenner