St. Bertin (c. 615 – c. 709) is a saint and abbot of Saint-Omer.

He was born near Coutances. At an early age he entered the monastery of Luxeuil in France where, under the austere rule of St. Columbanus, he prepared himself for his future missionary career. About the year 638 he set out, in company with two confrères, Mummolin and Ebertram, for the extreme northern part of France in order to assist his friend and kinsman, Bishop St. Omer, in the evangelization of the Morini. This country, now in the département of Pas-de-Calais, was then one vast marsh, studded here and there with hillocks and overgrown with seaweed and bulrushes. On one of these hillocks, Bertin and his companions built a small house whence they went out daily to preach the word of God among the natives, most of whom were still heathens.

Gradually some converted heathens joined the little band of missionaries and a larger monastery had to be built. A tract of land called Sithiu had been donated to Omer by a converted nobleman named Adrowald. Omer now turned this whole tract over to the missionaries, who selected a suitable place on it for their new monastery. Additional villages were granted by Count Waldebert, later a monk at Bertin's monastery of Sythiu and eventually abbot of Luxueil and canonized, who gave his son at the baptismal font to Bertin, from whom the boy received his name and his education. The community grew so rapidly that in a short time this monastery also became too small and another was built where the city of St. Omer now stands.

Jacques Bertin (July 27, 1918 – May 3, 2010) was a French cartographer and theorist, known from his book Semiologie Graphique (Semiology of Graphics), edited in 1967. This monumental work, based on his experience as a cartographer and geographer, represents the first and widest intent to provide a theoretical foundation to Information Visualization.

Jacques Bertin was born in 1918 in Maisons-Laffitte, Yvelines. When he was 10, he received the first prize of cartography at primary school. He never had problems with drawing, and pursued interests including architecture, the teaching of drawing and cartography. Finally he ended up studying geography and cartography at the Sorbonne.

He became founder and director of the Cartographic Laboratory of the École pratique des hautes études (EPHE) in 1954 and director of education in 1957. In 1967 he became professor of the Sorbonne, and in 1974 he became director of education and director of the Geographical Laboratory of the École des hautes études en sciences sociales (EHESS), which is part of the École pratique des hautes études (EPHE, VIe Section). Later in the 1970s he became head of research at the Centre national de la recherche scientifique (CNRS).