Joachim Ottens (1663 - 1719) and his sons Renier (? - 1750) and Joshua (? - 1765) Ottens were prominent Dutch booksellers and map publishers from about 1680 to 1790. Joachim, the founder of the firm, was initially employed as a copperplate engraver by Frederick de Wit. In 1711 Joachim founded his own firm. Though Joachim died only a few years later, his sons Renier and Joshua took over the firm and presided over its most prolific period. The Ottens family's most notable contribution to cartography were its enormous made-to-order multi-volume atlases such as the Atlas Major. Some examples of the Atlas are compiled from over 800 separately issued maps.