In Germany, the principle of jus sanguinis ( right of blood) applies. . This means that German citizenship is generally acquired through descent from a German parent, regardless of the place of birth.
Under § 4 Law on Citizenship, a child automatically acquires German citizenship at birth if at least one parent is a German citizen at that time.
If you acquire German citizenship by descent, any children born after your naturalization are automatically German citizens, no matter where they are born.
However, if you already have children before your citizenship application is approved, and you were not yet a German citizen at the time of their birth, ius sanguinis does not apply automatically. In that case, you must submit separate applications for citizenship by descent on behalf of your children. This process is usually straightforward, as you can reuse the same proof of lineage you provided for your own application and simply add documentation proving your own parenthood.