I’m not entirely sure, but I think Liyang, and Prince Ji are titles, in the same vein as Prince Yu, Prince Jing, etc, and not personal names. I’m pretty sure that Jinyang is not Lin Shu’s mom’s personal name, because her name was similar to the place in MCS’s travel journal that he was avoiding writing.

PS. I don’t think this is helpful, but the ”yang” in Liyang and Jinyang are the same character! (阳)