Boshoff also existed in Barkley West (near Boshoff Free State) Northern Cape during Boer War in 1880's. Could have been born there as well. Had two possible siblings born in Barkley West during this time. His father names possibly also William Thomas as this was the father of the siblings born and hey died early age. My grandmother visited his family apparently in Germany prossumably after his death in 1974. No records exist.
Have you taken a DNA test? If so, login to add it. If not, see our friends at Ancestry DNA.
Thanks Esmé