Hi. I'm not related to this family.This is tough, because there are several John Pacelli's born during that time frame in NY with parents b. Italy.I found an obituary for a John A. Pacelli at http://www.fultonhistory.com/Fulton.htmlhttp://www.fultonhistory.com/Fulton.html:
Schenectady Gazette (NY) - Wed, 14 Oct 1964 - "John A. Pacelli, 48, of 2422 Turner avenue, a foundry employee of the General Electric Co. for 25 years, died yesterday... Born in Jessup, Pa., he had lived in Schenectady 40 years.Mr. Pacelli was a member of the Polish American War Veterans of World War II.. Survivors include his widow, Mrs. Irene Sammler Pacelli; and three daughters, Mary Ann, Linda-Lee Ann, and Virginia Mary Pacelli, all of Schenectady... Burial will be at St. Anthony's cemetery.."
That gives him a birth date of 1916.
Here is a marriage notice in the Schenectady Gazette (NY) - 20 Jul 1945 - "Marriage Licenses... John Pacelli, 2422 Turner avenue and Irene Sammler, RFD 1, Elnora."
There is one John Pacelli, b. 1915 Penn that matches the above:
1920 United States Federal Census about John Pacelli Name: John Pacelli [John Baccelli] Age: 1 [4 10/12] Birth Year: abt 1919 [abt 1918] Birthplace: Pennsylvania Home in 1920: Schenectady Ward 9, Schenectady, New York Race: White Gender: Male Relation to Head of House: Son Marital Status: Single Father's Name: Pasquale Pacelli Father's Birthplace: Italy Mother's name: Popina Pacelli Mother's Birthplace: Italy Household Members: Name Age Pasquale Pacelli42b. 1878 Italy, parents b. Italy; imm 1904; Laborer, Railroad Popina Pacelli 32 -wife- b. 1888 Italy, par b. Italy; imm 1913 John Pacelli 4 10/12b. 1915 Penn
John's age could be 1 10/12or 4 10/12 months old.It looks to me like a 4.
Here is the family in 1930:
1930 United States Federal Census about Pasquali Pacelli Name: Pasquali Pacelli [Pasqual Pacelli] Gender: Male Birth Year: abt 1880 Birthplace: Italy Race: White Home in 1930: Schenectady, Schenectady, New York View Map Marital Status: Married Immigration Year: 1924 Relation to Head of House: Head Spouse's Name: Josepine Pacelli Father's Birthplace: Italy Mother's Birthplace: Italy Household Members: Name Age Pasquali Pacelli50b. 1880 Italy, par b. Italy; Yard Mine?, Electrician Josepine Pacelli44 -wife- b. 1886 Italy, par b. Italy John Pacelli 13 -son- b. 1917 NY Victur Pacelli 18 -nephew- b. 1912 NY
And in 1940:
1940 United States Federal Census about Pasquale Pacelli Name: Pasquale Pacelli Respondent: Yes Age: 62 Estimated Birth Year: abt 1878 Gender: Male Race: White Birthplace: Italy Marital Status: Married Relation to Head of House: Head Home in 1940: Schenectady, Schenectady, New York View Map Street:2422 Turner Avenue House Number: 2422 Inferred Residence in 1935: Schenectady, Schenectady, New York Residence in 1935: Same House Citizenship: Having first papers Sheet Number: 10B Number of Household in Order of Visitation: 149 Household Members: Name Age Pasquale Pacelli62b. 1878 Italy; Porter, Electrical Industry Josephine Pacelli54 -wife- b. 1886 Italy John Pacelli 24 -son- b. 1916 Penn; New Worker, Electrical ?
As you can see they are living at the same address as in John's marriage notice.So, this is that John's family.I just don't know if it is your John's family.Hope this helps.Annie