Piyassili
1315 BC ) , also known as Sarri-Kusuh ( or "Šarri-Kušuḫ" ) , was a Hittite prince and a middle son of King Šuppiluliuma I—younger than the heir Arnuwanda II , but older than the eventual successor Muršili II and probably older than the ill-fated Zannanza too . 
<triplet> Šuppiluliuma I <subj> Arnuwanda II <obj> child <subj> Muršili II <obj> child <triplet> Muršili II <subj> Zannanza <obj> sibling <triplet> Zannanza <subj> Muršili II <obj> sibling