Yaqut Al-Hamawi
Yāqūt ibn-'Abdullah al-Rūmī al-Hamawī) (1179–1229) (Arabic: ياقوت الحموي الرومي) was an Islamic biographer and geographer renowned for his encyclopedic writings on the Muslim world. "al-Rumi" ("from Rûm") refers to his Greek (Byzantine) descent; "al-Hamawi" is taken after Hama, Syria, and ibn-Abdullah is a reference to his father's name, Abdullah. The word yāqūt means ruby or hyacinth.