Qamar ud-Din, or Kamaruddin etc. is a Muslim male or female name or (in modern usage) surname. In Arabic, Qamar ud-Din () means "Moon of the Faith", and also refers to an apricot-based beverage. It may refer to:
Men Shah Sultan Qamar ad-Din ar-Rumi (died 1075), Sufi missionary to Bengal Qamar-ud-din Khan Dughlat (died 1392), Mongol ruler of Moghulistan between 1368 and 1392 Qamar-ud-din Khan, Asaf Jah I (1671–1748), founder of the Asaf Jahi dynasty of Hyderabad Itimad-ad-Daula, Qamar-ud-Din Khan (died 1748), former Grand Vizier of the Mughal Empire Khwaja Qamar ul Din Sialvi (1906–1981), Pakistani religious leader and politician Kamruddin Ahmed (1912–1982), Bangladeshi diplomat, lawyer and politician Qamruddin Ahmad Gorakhpuri (1938–2024), Indian Islamic scholar Qamaruddin Butt (1914–1974), Pakistani cricketer Qamaruddin Bismillah Khan (1916–2006), Indian shehnai player Komarudin (1919–1949), Indonesian freedom fighter Kaimar-ud-Din bin Maidin (1942–2009), Malaysian athlete Raja Petra Kamarudin (1950–2024), British-Malaysian journalist Kamarudin Jaffar (born 1951), former Malaysian Minister of Foreign Affairs Kamaruddin Jaafar (born 1951), Malaysian politician Komaruddin Hidayat (born 1953), Indonesian academic and intellectual Kamaruddin Taib (born 1957), Malaysian businessman Kamarudeen 'Kamaru' Usman (born 1987), Nigerian-American MMA fighter and former UFC Welterweight Champion Haziq Kamaruddin (1993–2021), Malaysian Olympic archer Kamarudin Meranun (born 1960), Malaysian businessman Kamaruddin Bohan (born 1995), Malaysian footballer Komarodin (born 1995), Indonesian footballer Kamruddin Ahia Khan Majlish (died 2020), Bangladeshi politician Suhaimi Kamaruddin, Malaysian politician Kamarudin Md Nor, Malaysian politician Kamaruddin Ahmed Dinajpuri, Bangladeshi politician
Women Zuraida Kamaruddin (born 1958), Malaysian politician
Other Qamar al-Din, a Syrian apricot drink popular during the month of Ramadan
See also Qamar (disambiguation) Quammruddin Nagar, town in the Indian state of Delhi