London Gazette, 6 October, 1931
NATURALIZATION.
LIST of ALIENS to whom Certificates of
Naturalization have been granted by the
Secretary of State, and whose Oaths of
Allegiance have been registered in the Home
Office during the month of September, 1931.
The date shown in each case is the date on
which the Oath of Allegiance was taken.
...
Gourfinkel, Alexander. Child of Boris Gourfinkel.
Gourfinkel, Boris; Russia; Manager; 1, Finborough
Road, Kensington, London.
9 September, 1931.
Source: London Gazette Issue 33759, Page 6388