Namesakes
Fictional Characters from Movies:
1 villain
Jafar 1992 Aladdin 
Islamic Caliphs:
1 caliph
Caliph Jafar al-Muqtadir 908-932 Abbasid
Notable Philosophers and Thinkers:
1 theologian
Ja'far al-Sadiq 702-765
King Jafar Khan Zand 1785-1789