Abu Bakr · Brahmagupta Were Abu Bakr and Brahmagupta alive at the same time? Yes. Abu Bakr and Brahmagupta were alive at the same time, from c. AD 598 to AD 634. Abu Bakr1st Rashidun Caliph and father-in-law of MuhammadBorn c. AD 573 · died 23 August AD 634BrahmaguptaIndian mathematician and astronomerBorn c. AD 598 · died c. AD 670 Gregory IMuhammadAbu BakrUmar ibn Al-KhattābBrahmaguptaAlī ibn Abī Ṭālib Abu Bakr and Brahmagupta in bold, with some of their best-known contemporaries. Drag across to see the age each reached in any year. Faded ends mark uncertain dates.