Sharaf al-Din Shah-Mahmud Jan Daylami Qazvini (Persian: شرف الدین شاه-محمود جان دیلمی قزوینی), better known as Mahmud Jan Daylami (محمود جان دیلمی) was an Iranian bureaucrat from the Daylami family, who occupied high offices under the Aq Qoyunlu and the Safavids.