Petrus Trương Vĩnh Ký

Jean-Baptiste Petrus Trương Vĩnh Ký (chữ Hán: 張永記; 6 December 1837 – 1 September 1898), known as Petrus Ký, was a Vietnamese scholar whose publications helped improve understanding between colonial Vietnam and Europe. His works helped popularize the Vietnamese alphabet, chữ Quốc ngữ, leading to its officialization in the early 20th century. He served in the French colonial regime as a linguist and also translated many literary works into modern Vietnamese.