The origin of Oman's name seems to be related to Pliny the Elder's Omana and Ptolemy's Omanon ( in Greek), both probably the ancient Sohar. The city or region is typically etymologized in Arabic from ''aamen'' or ''amoun'' ("settled" people, as opposed to the Bedouin), although a number of eponymous founders have been proposed (Oman bin Ibrahim al-Khalil, Oman bin Siba' bin Yaghthan bin Ibrahim, Oman bin Qahtan and the Biblical Lot) and others derive it from the name of a valley in Yemen at Ma'rib presumed to have been the origin of the city's founders, the Azd, a tribe migrating from Yemen.