Gerard of Guelders (c. 1149 - 1181) was count consort of Boulogne.
Gerard was the first-born son of the count of Guelders Henry I[1] and Agnes of Arnstein.
[3] In 1181, Gerard married Ida, Countess of Boulogne,[4][5][6] first-born daughter of Matthew of Alsace and Marie I, Countess of Boulogne.
[5] Ida then returned to her county, taking everything her deceased husband had gifted her, using force when necessary.
[5] Gerard of Guelders has no known descendants.