沙子

Alternatively we could keep as "Jiu Huangshu" and then explain via context? But the instruction says to romanize names, not necessarily titles. I'd lean to translate title for readability. Thus translation: "The daughter of the prime minister's residence, Gu Jiu Ling, pregnant out of wedlock, a scandal that not only got her engagement to the crown prince annulled but also nearly got her poisoned to death. To save her life,