(1) AR RASHID BI'LLAH.Bin Al Mustarshid   

(2) 529-530

وَلمْ يَدُمْ غَـيرَ قَلِيْـلَ المُـدَّةِ
ثمَّ ثَلاثِينَ أَتمَّ عُمْرُهُ(4)​

وَبُوْيِعَ الرَّاشِدُ بِالخِلافَـةِ
وَسَنَةٌ تَنْقُصُ شَيْئَاً عَهْدُهُ(3)​

(1) Abu Jaa'far Mansur  ibn Alfadhl the son of al Mustarshid b Ahmid -u'l Mustadhir Billah bin Abdullah AlMuktadi BiAmir Allaha bin Muhammad bin Abdullah alkaim biamir Allah bin Ahmid bin Jaafar almuqtadir bin ahmid almua’tadid bin  Talha almuwafaq bin Jaafar almutawakil bin Muhammad almua’tasim ibn Harun ArRashid bin Muhammad almahdi bin ALMansur Alabbasi

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(2) He was acknowledged Caliph on the assassination of his father in Thursday the 17th of Du'l Hijjah, 529 a.h ((albedaia w alnehaia 12/209)) and said in Monday the 27th of Du'l Kaa'dah 529a.h (The completed history 9/173). His deposition was in Monday the 16th of Du'l Kaa'dah , 530a.h ((albedaia w alnehaia 12/210)) (The completed history 9/292).He was slewed with knives till death  in Aspahan in the 16th  of Ramadan, 532 a.h . ((albedaia w alnehaia 12/212)) (The completed history 9/305).

 

(3) The duration of his reign lasted for eleven months and eleven days ((albedaia w alnehaia 12/210)) (The completed history 9/292).