 Daube was an in-law of Leo Strauss (one of Selma Ascher's siblings married into the Strauss family of Amöneburg-Kirchhain-Marburg).Daube was critical in getting Strauss out of Nazi Germany by helping to find him a position at the University of Cambridge in 1935.Daube fled Germany for England earlier, in 1933, but made several trips back to Europe to help bring out family members, friends, and mere acquaintances, with the assistance of Cambridge professors, fellows, and students - but especially the then-graduate student Philip Grierson.