Ottens (fl. c. 1680 - 1785) was a prominent Amsterdam map publishing family active for nearly 100 years. Joachim Ottens (1663 - 1719) was born in Amsterdam to a family of seafarers and educated in Amsterdam's Evangelical Lutheran community. He likely learned copperplate engraving under Frederick de Wit (1629 - 1706), for whom he worked until about 1710. In 1710, he was admitted to the Sint-Lucasgilde (Guild of St. Luke) and, in 1711, Joachim founded his own firm. Although Joachim died only a few years later, in 1719, his widow continued the business, either publishing as either 'I. Ottens', 'Ottens', or 'In de Wereldcaert' [In the World Map]. In 1726, Joachim Otten's sons, Renier (1698 - 1750) and Joshua (1698 - 1750), established a partnership and generally published as 'R. and I. Ottens'. Although they ran separate shops, on Nieuwendijk and Kalverstraat, they worked jointly as a singular business until Renier's death in 1750, at which point Joshua assumed full control. After Joshua's death in 1765, his widow continued the firm with their son, Renier II, changing the imprint to 'Joshua and Reinier Ottens.' Joshua's widow, Johanna de Lindt, held an auction sale of their engraved plates in 1784. Ottens' work stands out in that all of their maps were separate issues, though often found compiled into special, made-to-order multi-volume composite Atlas factice works, such as the Atlas. Some examples of the Atlas include over 800 separately issued maps. Because they were not uniformly issued in standard atlases, Ottens maps are often of the utmost rarity and are notable for their exceptionally rich engraving.
