Despite significant developments in understanding the role of women in early-modern business, more is needed to fully understand women’s impact on eighteenth-century trading networks. Further, much less is known about the role of wider family members, especially children, in the eighteenth-century Atlantic economy. The formal documentation that is privileged in business histories does not tell the whole story, and it frequently represents mercantile activity as a pursuit dominated by a patriarch at the center of a trading network. This article explores eighteenth-century familial commercial networks through extensive use of the personal family correspondence of three merchant families who lived and traded within different locales of the northern Atlantic: Hugh Hall, a merchant and vice judge of the admiralty in Barbados; the Black family, who were wine merchants in Bordeaux; and Joseph Symson, a mercer and shopkeeper from Kendal, England. This article will show that women appear as autonomous players with the power and ability to make informed and independent decisions that directed the business interests of their families. Moreover, it includes an assessment of the ways in which merchants cultivated the expertise of their extended families to enhance their commercial networks and advance their business pursuits. Focusing on children who supported or enhanced the prosperity of the family firm, this article emphasizes that their participation was intentional, not incidental. This article asks questions about the emotional consequences of such activity—which have rarely been considered in any detail—as well as the financial benefit of operating in this manner.