Family is a relevant entity for mothers of victims of state violence in Brazil. Not only because these women's lives are deeply marked by the loss of a child, but also because these mothers begin to develop significant family-producing relationships. The formation of collectives of victims' families, naming processes and commensality practices are some of these relationships that make family a symbolic and political entity of vital importance in these cases. Analyzing the formation of families and kinship relationships developed by mothers of victims who fight against State violence, therefore, is the central objective of this work. Through ethnographic research carried out by the authors over the last seven years in Rio de Janeiro and São Paulo, Brazil, with two groups of mothers, we are interested in knowing questions such as: what family constitution do these groups produce? What are the concrete and symbolic practices used in this creation? What is the place of the living and the dead in these new family arrangements? How is the fight for justice carried out based on these family dynamics? To answer these and other questions, field diaries produced during ethnographic fieldwork in these two contexts will be used, as well as an anthropological bibliography and literature from other areas that address topics such as kinship, family, social movements, politics, race, violence, commensality and creation.