| Birth Name: | Jean De Mesmaeker |
| Birth Date: | 1935 12, df=yes |
| Birth Place: | Brussels, Belgium |
| Death Place: | Brussels, Belgium[1] |
| Nationality: | Belgian |
| Notable Works: | Sophie Starter Gaston Lagaffe |
| Cartoonist: | y |
Jean De Mesmaeker (21 December 1935 – 30 April 2017), known by the pseudonym Jidéhem (in French ʒi.de.ɛm/; from the initials "JDM"), was a Belgian comics artist in the Marcinelle school tradition.
He was best known for his series featuring a cute, playful and adventurous young girl, Sophie. A creator of his own series Sophie, and Ginger, and noted for his work with Starter and Uhu-man, he is known for his collaborations and assistance to the work of André Franquin during a long career at the Franco-Belgian comics magazine Spirou, working on Spirou et Fantasio and Gaston Lagaffe, on which he shared co-authorship for several years.[2] [3]