This paper charts the emergence of social scientific studies on Black kinship from its origins in the United States and colonial Caribbean to its revivification in the decolonisation-era Netherlands. Demonstrating how racial knowledge was from its inception a tool of transnational governance, the author argues that Black kinship studies also informed the development of the Dutch welfare state in the aftermath of decolonisation. Drawing upon Dutch state – and municipal – archival sources as well as the private papers and published works of key figures in Black kinship studies, she charts how publicly-funded sociologists and anthropologists tracked Dutch citizens from Suriname and the Netherlands Antilles through the metropolitan welfare state, producing a corpus of knowledge that connected kinship and welfare reliance. Though Caribbean-born Dutch citizens opposed the racist assumptions of state-funded scholarship, research on Black kinship ultimately informed the course of Dutch welfarism from the expansion of interventionist programmes in the 1970s to retrenchment in the 1990s.