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German citizenship law is fundamentally based on the so-called parentage principle. This means that German citizenship is acquired primarily from the parentage of a German parent. In addition, since 2000, domestic and foreign parents can also be acquired.
The reasons for acquiring German citizenship are as follows:
Acquisition through conjugal birth
Marital children who were born between 01/01/1914 and 31/12/1963 only acquired German citizenship through their German father.
Marital children of a German mother, who were born after 01.01.1964 and before 31.12.1974, acquired German citizenship if they otherwise would have become stateless.