Princess Dowager Yin
She was the mother of its second duke , Li Xin and the second wife of its founder Li Gao ( Prince Wuzhao ) , who was posthumously honored by Li Xin as a prince , and therefore Lady Yin was honored as a princess dowager even though her husband never carried the princely title while alive . 
<triplet> Li Gao <subj> Li Xin <obj> child