Hi Kim
I don't have anything definite regarding John Grant but have tried to find him.
Firstly I checked for his naturalization record using the information that Carolyn provided at the "Italian Genealogical Group" (although I always use the Stephen Morse site to access the IGG
http://stevemorse.org/ )
I didn't find the record in Kings County or Brooklyn but it was in the "Southern District (Manhattan, Bronx, Westchester) 1906-1959"
Certificate Number, 1946990
Surname, Grant
First Name, John
Age, 26
Petition Volume, 194
Petition Number, 48323
Date of Certificate, 05/19/1924
Approx year of Birth, 1898
So onto looking for a John Grant in the 1920 census....found just one that was not born in US and this John's occupation is Chauffeur for private family.
370 Columbus Avenue, Manhattan Assembly District 7, New York
Head, Margaret Mullane, age 45, widow, immigration year 1890, naturalized, born Ireland, parents born Ireland
Son, James D, age 20, single, born New York
Son in law, John Grant, age 22, married, immigration year 1914, PA (Papers Applied for), born Ireland, parents born Ireland, occupation Chauffer Private Daughter, Margaret Grant, age 19, married, born New York
Grand Daughter, Margaret M, 1 year and 7 months, born New York
In 1930 there are two John Grant's of the right age, the other John is single, born Scotland immigration year 1914, occupation Electrician, naturalized and living with parents in Park Place, Brooklyn. The Irish John and family are still at 370 Columbus Avenue along with another daughter Juletia ? age 5. John's occupation is still Chauffeur, Private family and he is naturalized. John's birth place is shown as Northern Ireland (I believe that I have found his passenger list entry in 1915 and that he was born in Crossmaglen, Co. Armagh)
Regarding the Scottish John Grant, I know that others here on this board are extremely experienced in naturalization requirements but I vaguely recall reading that children are naturalized through a parent but all that I could find is this and it certainly isn't conclusive....
"Before 1906, only the head-of-household was required to become naturalized with the remainder of the family automatically naturalized when he/she received the final papers. This means that wives and children are not listed separately nor were separate records required until the late 1920's when both spouses needed to register. Later the children required separate records."
http://www.nd.gov/hist/sal/gen/infnat.htmWell as I have such a strong "feeling" about Irish John
His WWI draft index card shows him living at 370 Columbus Avenue, wife Margaret. His occupation is Chauffeur and employer ? O'Brien, 303 W65th Street, NY.
Born 17th January 1898.
This is John's SSDI entry
Name, John Grant
Last Residence, Brooklyn, Kings, New York
Born, 17th January 1898
Died, February 1985
Obviously this cannot be proved from the online databases. The IGG have a printable form to request Naturalization records although I am not sure how you feel about this. There are again many on this board who could advise you about this as well as possibly how to go about maybe? finding an obit....
Really hope that this helps in some way...it would be lovely to hear that you eventually find more about Elizabeth's life in the US.
Very best wishes
Yvonne