9 dated entries naming Abbasid dynasty, drawn from 9 separate years between 781 CE and 1517 CE. Nothing here is written by us: each line is the sentence a Wikipedia year article used, and the link beside it opens the exact revision.
781Marriage of Abbasid prince Harun ibn al-Mahdi (future caliph Harun al-Rashid) and Zubaidah bint Ja'far.source
789Amat al-Aziz Ghadir, was the mother of Abbasid prince; Ali ibn Harun al-Rashid.source
9th century
803November - December: Caliph Harun al-Rashid marries Umm Muhammad, the daughter of Abbasid prince Salih al-Miskin and Umm Abdullah, the daughter of Isa ibn Ali, in Al-raqqah. She had formerly been married to Ibrahim ibn al-Mahdi, who had repudiated her.source
11th century
1093June 21 – Ja'far ibn Abdallah al-Muqtadi, Abbasid prince, son of al-Muqtadi and Mah-i Mulksource
12th century
1112February 3 – Abu Ishaq Ibrahim ibn Ahmad al-Mustazhir, was the son of Abbasid caliph al-Mustazhir and Ismah.source
1114October – Abu Ishaq Ibrahim ibn Ahmad al-Mustazhir, was the son of Abbasid caliph al-Mustazhir and Ismah.source
1135August 29 – Caliph Al-Mustarshid is assassinated at Baghdad after a 17-year reign. He is succeeded by his son Al-Rashid Billah as ruler of the Abbasid Caliphate (until 1138).source
13th century
1262Al-Hakim I, a member of the Abbasid dynasty, travels to Egypt and is proclaimed as caliph of Cairo in succession to his former rival Al-Mustansir II. After his arrival, he is imprisoned at the Citadel of Cairo by orders of Sultan Baibars but released in 1296 by Sultan Lajin.source
16th century
1517April 13 – Tuman Bey II, the former King of Egypt, is executed along with his aides, bringing an end to the Abbasid dynasty.source