Ludwig von Kerlich
From NSWiki
Ludwig, Duke von Kerlich (1908-1938) was the son of Duke Alfred von Kerlich and Princess Geraldine of Brasland.
In 1933 he married Princess Iris of Brasland, and they had two children: Gloria (born 1935) and Johannes (born 1937).
Ludwig succeeded his father as Duke von Kerlich in 1936, but he died on a tragic air crash two years later, in 1938.