Lucas van Foreest
A member of the Van Foreest family , his brother Jorden won the Dutch Chess Championship in 2016 , and both his great-great grandfather Arnold and great-great granduncle Dirk were three-time Dutch Champions . 
<triplet> Jorden <subj> Arnold <obj> relative <triplet> Arnold <subj> Jorden <obj> relative <subj> Dirk <obj> sibling <triplet> Dirk <subj> Arnold <obj> sibling