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German Law/US citizen investigating German ius sanguinis


Hello!  I'm keen to find out whether I qualify for German citizenship thanks to my paternal great-grandfather being born in Germany in 1856.  I found his name on the US Naturalization records for 1875 (before my grandfather was born), and I suspect this may make it impossible for me to claim citizenship.

If that's not a deal-breaker, my grandfather was born in 1907, my father was born in 1947, and I was born in 1969.  None of us served in the US military.


Hello David,

when your great-grandfather was naturalized in 1875, he did indeed lose his German citizenship in the process and was thus unable to pass it on.

Apart from that, many Germans living abroad lost German citizenship between 1871 and 1913 when they failed to register at a German consulate every 10 years.


Andreas Moser

German Law

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Andreas Moser


Extensive experience in international family law, especially international child abductions and child custody cases. All other areas of German law as well: constitutional law, criminal law, business and contract law, immigration law, inheritance law, and so on.


Lawyer in Germany from 2002 to 2009. Lawyer for US Army JAG Corps before. Bar-certified specialisation in family law and in administrative law. Articles and lectures about international and domestic family law.


2000 Law Degree from University of Regensburg, Germany 2002 admitted to the bar (until 2009) 2013 MA Philosophy at the Open University, UK

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