My great grandfather was Dr Johann Georg Gadow. He came from Leipzig and Halle. He was educated at Vienna University. He married Katharina Rey, the daughter of Prof Eugen Rey the world famous astromomer and natural scientist. He emigrated to the diamond mines of South Africa in the late 1890's, with his wife and two children. I am interested in tracing both the Gadow and Rey surnames. The Reys originally came from France and fled to Germany during the Revolution and dropped the title. Before that the family came from Spain and there is a connection to the Spanish Royal family. As this family links to the British Royal family through John of Gaunt - this would be a very interesting line to trace.