SS Race and Settlement Main Office
The SS Race and Settlement Main Office (Rasse- und Siedlungshauptamt der SS, RuSHA) was the organization responsible for "safeguarding the racial purity of the SS" within Nazi Germany. One of its duties was to oversee the marriages of SS personnel in accordance with the racial policy of Nazi Germany.
Source: Wikipedia — SS Race and Settlement Main Office (CC BY-SA 4.0)