Bettina von Arnim
Her nephews , via her brother Christian , were Franz and Lujo Brentano . 
<triplet> Christian <subj> Lujo Brentano <obj> child <triplet> Franz <subj> Christian <obj> father <subj> Lujo Brentano <obj> sibling <triplet> Lujo Brentano <subj> Christian <obj> father <subj> Franz <obj> sibling