Mozes Salomon van der Horst was a son of Salomon Moses van der Horst. His mother, who lived at the same address, survived the war.
Addition of a visitor of the website
De vermelding op het fysieke Joods Monument in Utrecht ging in 2015 fout.
Zie: https://www.joodsmonument.nl/nl/page/600389/joods-monument-utrecht---correcties
In addition, a Jokos file (number 794) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.