Emperor Jingzong of Tang
Emperor Jingzong was the eldest son of emperor Emperor Muzong and elder brother of eventual Emperor Wenzong and Emperor Wuzong . 
<triplet> Emperor Wenzong <subj> Emperor Muzong <obj> father <subj> Emperor Wuzong <obj> sibling <triplet> Emperor Wuzong <subj> Emperor Muzong <obj> father <subj> Emperor Wenzong <obj> sibling