Perele's name was found as Marcel M.V.M. Sandelowsky in the archives of Westerbork. His parents survived Bergen-Belsen.
De officiele naam van Peterle staat in de archieven van Westerbork vermeld als . Peterle's ouders hebben de oorlog overleefd.
In September 1946, an obituary was placed in the Nieuw Israëlietisch Weekblad by children and other relatives for their father and father-in-law George Sandelowsky who was 66; for 'our little sunshine and hope for the future' Peterle Sandelowsky who was eight months old; for mother and mother-in-law Gitella Cohn-Pels who was 52; for father and father-in-law Aron Cohn Dr. Phil whom 'we had to leave behind while he was dying' and for mother and mother-in-law Rosa Sandelowsky-Wulff who succumbed to a typhoid epidemy in Tröbitz.
Nieuw Israëlietisch Weekblad, 14 September 1945, 7