The Louise (Regehr) Wiens Collection contains documents and history of the Regehr family. It has been split into two series: Certificate and Family History.

The Certificate Series consists of marriage, death, and birth records of the family, a passport belonging to Maria Nuemann, and admission papers. The series also includes two identification cards for Victor Regehr and Maria Nuemann Regehr. There is a certificate of death for Akon Nuemann from 1982, that formally was believed to be in Russian, but on 1/30/2018 it was discovered that the language was in Ukrainian. The certificate of dead was from the Kazakh South Socialist Republic in Ukraine. The birth certificate for Arthur Regehr born in 1953 was also believed to be in Russian, and found out later to be in Ukrainian.

The Family History Series consists of letters to family members, a letter describing the past of Maria Neumann, and a photocopied newspaper article in Russian that holds details in what the family members entailed during their lives. In addition, this series also contains the funeral program for Maria Regehr, and information from the German Red Cross.