Tahir bin Jalaluddin
Tahir Jalaluddin was a famous Muslim ulama in Southeast Asia.
He became the editor for Al-Imam publication which was published in Singapore between 1906 and 1908.
Tahir published two major treatises on astronomy: Natijatul'Umur and Kitab Jadual Pati Kiraan - logarithms for determining the direction of kiblat and times for prayer.
His son Hamdan bin Sheikh Tahir was a Penang state governor from 1989–2002.