Ruth Loebel was a student of the Amsterdams Lyceum in 1936. From the Memorial 1940-1945 of the Amsterdams Lyceum, edited by Publishinghouse "Doorgeven" in Amsterdam, 1947.
This person is commemorated on a memorial in Amsterdam. More information on this memorial can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.
Ruth Ernestine Loebel zat in het schooljaar 1941-1942 in klas 5B van het Joods Lyceum in Amsterdam. Bron: Dienke Hondius, Absent: Herinneringen aan het Joods Lyceum Amsterdam 1941-1943 (Amsterdam 2001) 285.
In addition, a Jokos file (number 11964) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.