Citizenship Through Grandparent (Jure Sanguinis)

The Core Chain Principle

To qualify through a grandparent, you must establish that your parent acquired German citizenship at birth under the rules in effect at the time of their birth. The decisive question is whether citizenship was legally transmitted from your grandparent to your parent, and then from your parent to you.

Birth Date and Parental Status Rules

German citizenship transmission rules have changed significantly over time. Your eligibility depends on three factors: your birth date, whether your parents were married, and which parent was German.

Children Born in Wedlock (January 1, 1914 – December 31, 1974)

Children born in wedlock during this period acquired German citizenship only if the father was a German citizen at the time of their birth. German mothers could not transmit citizenship to children born in wedlock during this period.

Exception: Children born to a German mother in wedlock between January 1, 1964, and December 31, 1974, acquired German citizenship only if they would have become stateless otherwise.

Children Born in Wedlock (After January 1, 1975)

Children born in wedlock after January 1, 1975, acquired German citizenship if either parent was a German citizen at the time of their birth — mother or father.

Children Born Out of Wedlock

• Children born out of wedlock to a German mother after January 1, 1914, acquired German citizenship automatically.
• Children born out of wedlock to a German father before July 1, 1993, may acquire German citizenship by declaration before their 23rd birthday, if paternity has been established according to German law.
• After July 1, 1993, children born out of wedlock to a German father acquire German citizenship if paternity is established.

Historical Complexity and Gender Discrimination

Before 1975, German mothers generally could not transmit citizenship to children born in wedlock. This created situations where descendants of German women did not acquire citizenship at birth even though their grandmother was German. These rules are now recognized as discriminatory.

The Fourth Act Amending the Nationality Act (effective August 20, 2021) introduced § 5 StAG, which allows acquisition by declaration for persons affected by gender discrimination and their descendants. The declaration must be submitted by August 19, 2031. If you qualify under this provision, you have a limited window to act.

Loss of Citizenship in the Family Line

German citizenship may have been lost when an ancestor voluntarily naturalized in another country under earlier legal rules. If a grandparent naturalized in another country before your parent was born, citizenship transmission would have been interrupted, and you would not qualify through that line.

Nazi-Era Persecution (Article 116(2))

Descendants of individuals who lost German citizenship between January 30, 1933, and May 8, 1945, on political, racial, or religious grounds may have the right to reclaim it. This includes:

• Jewish Germans who fled Nazi persecution
• People officially stripped of citizenship by the Nazi regime
• Their direct descendants

Important advantages of Article 116 cases: no residency requirement, no language requirement, dual citizenship permitted, and no generational limit.