but the historian al-tabari gives him the additional epithet "al-qutrubbulli", indicating that he came from qutrubbull, a district between the tigris and euphrates not far from baghdad, so perhaps his ancestors, rather than he himself, came from khwarizm ...

Write the above sentence using proper case.
But the historian al-Tabari gives him the additional epithet "al-Qutrubbulli", indicating that he came from Qutrubbull, a district between the Tigris and Euphrates not far from Baghdad, so perhaps his ancestors, rather than he himself, came from Khwarizm ...