Potential eligibility through GGF born in Domaczewo/Damačava in 1911
Hi all! I am trying to determine whether I may be eligible for confirmation of Polish citizenship by descent through my great-grandfather.
Great-Grandparents:
* Date married: 21 Jun 1936
* Date divorced: N/A
GGM:
* Date, place of birth: 10 Feb 1915, USA
* Ethnicity and religion: Jewish
* Occupation: Secretary, then Homemaker
* Allegiance and dates of military service: None
* Date, destination for emigration: N/A
* Date naturalized: US citizen at birth.
* Date, place of death: 28 Feb 2001, USA
GGF:
* Date, place of birth: 30 Sep 1911, Domaczewo (now Belarus)
* Ethnicity and religion: Jewish
* Occupation: Window Trimmer
* Allegiance and dates of military service: None
* Date, destination for emigration: 4 Jun 1921, USA
* Date naturalized: I believe he received derivative citizenship on June 4, 1921, as his father had naturalized in 1918 before the rest of the family arrived.
* Date, place of death: 18 Sep 1987, USA
Grandparent:
* Sex: F
* Date, place of birth: 1939, USA
* Date married: Aug 1960
* Citizenship of spouse: USA
* Date divorced: N/A
* Occupation: Homemaker
* Allegiance and dates of military service: None
Parent:
* Sex: M
* Date, place of birth: 1965, USA
* Date married: 1998, USA
* Date divorced: N/A
You:
* Date, place of birth: 2004, USA
My great-grandfather was born in wedlock. His father emigrated to the U.S. in 1911 and naturalized as a U.S. citizen in 1918. My great-grandfather, his mother, and his brother remained in Polish/former Polish territory until June 1921, when they arrived in the U.S.
My understanding is that under U.S. law, my great-grandfather may not have derived U.S. citizenship until he began permanent residence in the U.S. in June 1921. So I am trying to understand whether he could have acquired Polish citizenship under the 1920 Polish Citizenship Act while still living there, and whether his later derivative U.S. citizenship as a minor caused loss of Polish citizenship.
Because he was male and born in 1911, I am also trying to understand whether Polish military-obligation rules would have prevented loss of Polish citizenship before the 1951 citizenship law came into force.
I do not currently believe he served in any military before 1951.
Based on these facts, does this look potentially eligible, ineligible, or dependent on specific missing records?
Edit: Added missing template components.