Later on, Hajr broke up into several separate settlements and estates. The most notable of these were ''Migrin'' (or ''Muqrin'') and ''Mi'kal'', though the name ''Hajr'' continued to appear in local folk poetry. The earliest known reference to the area by the name ''Riyadh'' comes from a 17th-century chronicler reporting on an event from the year 1590. In 1737, Deham ibn Dawwas, a refugee from neighboring Manfuha, took control of Riyadh. Ibn Dawwas built a single wall to encircle the various oasis town in the area, making them effectively a single city. The name "Riyadh," meaning "gardens" refers to these earlier oasis towns.