Leonard Melki (1 October 1881 – 11 June 1915) – born Yusuf Habib Melki and in religious Liunar from B'abdat – was an Eastern Catholic priest and a professed member of the Order of Friars Minor Capuchin.
His name is often Romanized in various texts.
Melki became a priest before serving as a preacher and teacher in different stations of the Mission of Armenia and Mesopotamia of the Capuchin Order.
He eventually became the principal of the school of the Capuchin Order in Mardin where he taught the French language and music.
He was later killed in Mardin on June 11, 1915 with a convoy of displaced Armenians, Syriacs, Chaldeans, Protestants, by Turc soldiers during the genocide of World War I.Melki's cause for sainthood opened on 3 October 2005 – he was titled as a Servant of God.