Evidence suggesting accentuated sibling differentiation and de-identification is observed among adult children of Holocaust survivors, manifested in the respective family roles of each sibling, their relationships vis a vis the parents, and also in the siblings’ general adaptation styles. These dissimilarities are often accompanied by a negative quality of the sibling relationships. It is proposed that (dissociated) affects and enactments of unsynthesized parental trauma infuse implicit and explicit interactions in family life with survival themes and with intense concerns for the parents’ emotional well-being and polarize normative processes of sibling differentiation. Mutual resentments often cause dissolution of ties between siblings and their families in adulthood. Such processes represent intergenerational transmission of effects related to parental trauma that extend beyond the parent-child dyad, influencing the matrix of relationships in the family as-a-system, and damaging the siblings bond. The resulting loss of extended family connections for the third generation perpetuates raptured generational continuity, one of the devastating consequences of genocidal trauma. (PsycINFO Database Record (c) 2018 APA, all rights reserved)