Guillaume Danet (1670 – 1732) was a Paris based French bookseller and map publisher active in the late 17th and early 18th century. Danet married Marguerite-Geneviève De Fer becoming the son-in-law of the cartographer and map publisher Nicolas De Fer (1626 – 1720). Along with his brothers and brothers-in-law, Jacques-François Bénard (Besnard) Danet (husband of Marie-Anne De Fer and engraver to the King of Spain) and Remi Richer (an engraver who sold portion of the De Fer business to his brothers in 1721), Guillaume Danet inherited a portion Nicolas De Fer's publishing business in 1720. Both Danet and Bénard used the De Fer name and signage concurrently. Danet maintained a book and map shop on the Pont Notre-Dame. After Danet's own death in 1732, the business was continued by his widow, Marguerite-Geneviève, until about 1746. Marguerite-Geneviève died in 1746 after which many of the De Fer / Danet plates were acquired by Louis Charles Desnos.