Did you know that the surname (xing) of the Han Emperors was Liu? My father's mother is a Liu, though there are many tens of millions of Lius, so it isn't a particularly rare family name. Similarly, my mother's father was a Li (cf. most of the Tang dynasty rulers) and my father's father was a Xu (cf. the farmer who famously declined the throne offered by the legendary Emperor Yao). Finally, my mother's mother is a Wang (the second most common surname in China).