Analysis of information sources in references of the Wikipedia article "Abu Bakr ibn Umar" in English language version.
The Emir Abou Beker ben Omar... had as mother Safiya, free woman, of the Djedala
Abū Bakr ibn ' Umar, who is known locally as Ibn ' Āmir, was killed by a poisoned arrow in 1087
His grave, with his name but no date, is near Tijikja. in Tagant Region (Mauritania)
martyred Prince Abu Bakr bin Amer around 464 AH in Maksam in the Tagant region, 15 km from Quddiya currently known, on the outskirts of Tidjikja