What is "al-nawawi"

Abu Zakaria Yahya Ibn Sharaf al-Nawawī (1233–1277) , popularly known as al-Nawawī or Imam Nawawī (631–676 A.H./1234–1277), was an influential Sunni Shafi'ite jurist and hadith scholar. He authored numerous and lengthy works ranging from hadith, to theology, biography, and jurisprudence. Throughout his lifetime, Al-Nawawi never got married.