Khalid ibn Abd al-Malik al-Marwarrudhi
Astronomer
Khālid ibn ʿAbd al‐Malik al‐Marwarrūdhī was a 9th-century Baghdadi astronomer.
In 827, Marwarrūdhī, together with the astronomer ʿAlī ibn ʿĪsā al-Asṭurlābī and a party of surveyors, measured the length of a meridian arc of one degree of latitude. Wikipedia
Grandchild: Umar al-Marwarrudhi