Namibia is a republic in Africa with a spacious Atlantic coast and land borders with South Africa, Botswana, Angola, and Zambia. It was a German colony called German South-West Africa from 1884 until 1915 when it was taken over by the British Empire during World War I. The colony was renamed South-West Africa (or Southwest Africa) and the territory was administered by South Africa under a mandate by the League of Nations. It remained a de facto territory of South Africa, never formally annexed, until its independence in 1990.
This is the strongest probability. Although South Africa, which occupied Namibia, is a German ally in 2010, it was an enemy during the Point of Divergence. (See "Inconsistencies".) Before making South Africa their ally, the Germans would surely have taken their colony back first.