sì
wife or senior concubine of husbands older brother (old)
surname Si; elder sister (old)
姒文命
sì wén mìng
Si Wenming, personal name of Yu the Great 大禹[Da4 Yu3]
娣姒
dì sì
sisters-in-law (old)
褒姒
bāo sì
Baosi, concubine of King You of Zhou 周幽王[Zhou1 You1 wang2] and one of the famous Chinese beauties