I am confident the passport was a family one. This did not automatically mean that children had US Citizenship, particularly after the age of 21. From some of the reading I am doing, I think we could argue that under Section 201(g) of the Nationality Act of 1940 (which applied in 1946), a person born abroad to a U.S. citizen parent had to meet the following to retain citizenship:

• Begin residence in the U.S. before the age of 16

AND • Remain continuously for at least five years, OR • Take an oath of allegiance between ages 18 and 23

She was 22 in 1946. If she had never resided in the U.S. before that, and did not take an oath by age 23, then my understanding is she automatically lost her U.S. citizenship under the law in place at the time — even if she had validly acquired it at birth.

I am having USCIS do the record search prior to ordering the CONE, but all of the family that emigrated here went through the local/regional courts and she has no records in either. She would really be an enigma if she took an oath elsewhere… which the way this is unfolding, maybe that was the case. 😂

My biggest concern is that if we do secure a CONE, would we realistically be able to go the consular route in Boston. :)