Peter Rudolf Gisela Horn was a Czech-born South African poet. He made his mark especially with his anti-Apartheid poetry. At the end of World War II he had to flee from his home and settled with his parents first in Bavaria and later in Freiburg im Breisgau, where he completed high school in 1954. He then emigrated with his parents to South Africa.
https://en.wikipedia.org/wiki/Peter_Horn_(poet)