[kabar]

It does matter where he was born if only one of his parents was an American citizen. This would obviate jus sanguinis and the law at the time, i.e., 1961. His mother was only 18 and not present in the US for five years after the age of 14.

Birth Abroad to One Citizen and One Alien Parent in Wedlock: A child born abroad to one U.S. citizen parent and one alien parent acquires U.S. citizenship at birth under Section 301(g) INA provided the citizen parent was physically present in the U.S. for the time period required by the law applicable at the time of the child's birth. (For birth on or after November 14, 1986, a period of five years physical presence, two after the age of fourteen is required. For birth between December 24, 1952 and November 13, 1986, a period of ten years, five after the age of fourteen are required for physical presence in the U.S. to transmit U.S. citizenship to the child. .

[KTM rider]

But would not that require proof of Birth to a US mother ?

she could have been from france for all we know

Birth cert ?

. or DNA test ?