German nationality is based on the principle of parentage, meaning that a child automatically obtains German nationality at birth if at least one of the parents is German.
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It is possible for children of foreign parents who have acquired German citizenship by birth to have German nationality in addition to the nationality of their parents. The prerequisite is that they grew up in Germany.
According to the law, BAMF explains, a person grew up in Germany if, by the time they turn 21, they: have lived in Germany for eight years, or have attended a school in Germany for six years, or have completed their schooling or vocational training in Germany.