Margab (Riyadh) on:
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Al-Marqab (), or in Najdi vernacular pronunciation as al-Margab, is one of the oldest neighborhoods of Riyadh, Saudi Arabia, located east of al-Dirah and south of Thulaim in the sub-municipality of al-Batʼha. It was named after the Margab Fort, which was demolished in 1957. As the neighborhood is bounded by al-Batʼha Street to the west, its western strip partially forms part of the al-Batʼha commercial area.
The early traces of its existence dates back to 16th century, which nearly corresponds with the final stages of the disintegration of 
Hajr al-Yamamah
Hajr ( ar, حَجْر, Ḥajr), also known as Hajr al-Yamamah ( ar, حَجْر اليَمامَة, Ḥajr al-Yamāmah) or Khadra Hajr, was an ancient settlement founded by the Hanifites that roughly emerged in 5th century pre-Islamic Arabia and ...
that resulted in the succession of several settlements from the former.
References
Neighbourhoods in Riyadh {{SaudiArabia-geo-stub