Complex sentence: His ancestors, all sufi masters themselves, hailed from Shiraz in Iran and came to the Subcontinent when one of them accompanied Emperor Humayoun back to Delhi after his exile in Iran where Humayoun had originally met him.
Split into simpler sentences: His ancestors, all sufi masters themselves, hailed from Shiraz in Iran. They came to the Subcontinent when one of them accompanied Emperor Humayoun back to Delhi after his exile in Iran, where Humayoun had originally met him.