In reply to your enquiry the Auschwitz–Birkenau State Museum in Oswiecim would like to inform you that in partially saved records which are kept in our Archives there are the following data about below-mentioned prisoner:
HOORN Aron born on August 22 1922 in Haag was prisoner of „Juden Zwangsarbeitslager“ – slave labour camp for Jews – in Blechhammer. Date of deportation to this camp is unknown.
In April 1, 1944 mentioned camp star to be one of KL Auschwitz subcamp and then Aron Hoorn received prisoners’ number 177406. His further fate is unknown
Source of information: KL Auschwitz files.