Erich von Manstein
World War II Field Marshal Erich von Manstein (1887–1973) was the biological son of the general and his wife Helene von Sperling, who was adopted at birth by their childless brother-in-law, general Georg von Manstein and his wife, Hedwig von Sperling, sister to Helene. A third von Sperling daughter, Gertrud, was married to Paul von Hindenburg.