Fakhr al-Din Uthman ibn al-Hajj Yunis Ibn Ma'n (Arabic: فخر الدين عثمان بن الحاج يونس بن معن) also known as Fakhr al-Din I, was the Druze emir of the Chouf district in southern Mount Lebanon from at least the early 1490s until his death in 1506, during Mamluk rule. He was the head of the Ma'n family, whose emirs controlled the Chouf from 1120. He is credited by an inscription for building a mosque in Deir al-Qamar in 1493. He was briefly imprisoned by the Mamluk authorities in 1505 in relation to his alliance with the Bani al-Hansh clan against the Mamluk-appointed, Druze governor of Beirut.