Jean Jannon (born April 1580, Geneva; d. December 20, 1658, Sedan) was a French type designer, punchcutter and typefounder active in Sedan early in the seventeenth century. Jannon was a Protestant in mostly Catholic France, and began his career as printer for the Protestant Academy at Sedan in what is now north-eastern France before taking up punchcutting, in his thirties by his report. Sedan at the time enjoyed an unstable independence as a principality at a time when the French government had conceded through the Edict of Nantes to allowing a complicated system of restricted liberties for Protestants. Despite this, Jannon was commissioned in 1641 to provide matrices, moulds used to cast metal type, for the royal printing office. These matrices survive and remain in the government collection.
Jannon worked as a printer along with his career as a punchcutter, and in 1640 left Sedan for Paris. His career continued to meet with official hostility; four years later his printing office in Caen was raided by authorities concerned that he may have been publishing banned material. While not imprisoned, Jannon ultimately returned to Sedan and spent the rest of his life there.
Jannon began his career as a printer, taking up engraving metal type quite late in life by the standards of the period, in his thirties by his report. Jannon wrote in his 1621 specimen that:
Seeing that for some time many persons have had to do with the art [of printing] who have greatly lowered it…the desire came upon me to try if I might imitate, after some fashion, some one among those who honourably busied themselves with the art, [men whose deaths] I hear regretted every day [Jannon mentions some eminent printers of the previous century]…and inasmuch as I could not accomplish this design for lack of types which I needed…[some typefounders] would not, and others could not furnish me with what I lacked [so] I resolved, about six years ago, to turn my hand in good earnest to the making of punches, matrices and moulds for all sorts of characters, for the accommodation both of the public and of myself.
Jannon was one of the few punchcutters active in early seventeenth century France. This is perhaps owing to an economic decline over the previous century and due to pre-existing typefaces made during the mid-sixteenth century saturating the market.
Despite a distinguished career as a printer, Jannon is perhaps most famous for a long-lasting historical misattribution. In 1641, the Imprimerie royale, or royal printing office, purchased matrices, the moulds used to cast metal type, from him. By the mid-nineteenth century, Jannon's matrices formed the only substantial collection of printing materials in the Latin alphabet left in Paris from before the eighteenth century. The matrices came to be attributed to Claude Garamond (d. 1561), a revered punchcutter of the sixteenth century who was known to have made punches for the government in the Greek alphabet, albeit a century before the Imprimerie was established. The attribution came to be considered certain by the Imprimerie's director Arthur Christian. Doubt began to be raised by historian Jean Paillard in 1914, but he died in the First World War soon after publishing his conclusions and his work remained little-read.