This article explores the psycho-social space between autobiographical and collective memory concerning massive social traumas. It is conceptualized that there is a third type of memory image, termed "my-their." Individuals appear to "remember" autobiographical memories of elder family members, even though they could not, either because they were born after the trauma happened or because the autobiographers were extremely young at the time of the experience. These emotional "memories" furthermore connect to collective memories of social traumas of ethnic/national groups. Examples from memories of the Holocaust and al Naqba are examined. Furthermore, the roles that "my-their" memory images can play in peace building and reconciliation are discussed.