Soes Manus de Horst, son of Mozes de Horst and Naatje Keizer, was married to Roosje Meiboom. The couple had three children: Mozes, Mietje and David. The family lived on the Kerkstraat in Blokzijl. Soes Manus de Horst sold all kinds of goods.
H. Hamburger and J.C. Regtien, Joodse oorlogsmonumenten in de provincie Overijssel, alsmede algemene oorlogsmonumenten waarop joodse namen voorkomen. Profiel (Bedum 2002) 13
In addition, Jokos files (numbers 4288, 16785) on this family or other family members are at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos files reveal that a claim was lodged for compensation for looted securities or bonds. (W-claim, number Csp19/1101).