Immigration: "New York Passenger Arrival Lists (Ellis Island), 1892-1924" Citing Page: 117; Affiliate Publication Title: Passenger and Crew Lists of Vessels Arriving at New York , NY, 1897-1957; Affiliate Film Number: T715-3588; Affiliate Line Number: 0009; FHL microfilm: 1755326; FamilySearch (accessed 20 December 2021) FamilySearch Image Image number 00629 Name: Wojciech Lopacinski; Immigration Date: 24 Dec 1924; Immigration Place: Ellis Island, New York City, New York, United States; Birth Date: 1874; Marital Status: Married; Nationality: US Citizen; Residence Place: Przyjma, Poland; Age: 50; Event Place Sup: Ellis Island, New York City, New York, United States; Event Place Year Range: 1892-1955; Departure Port Name: Copenhagen; Ship Name: Oscar ll; XArr Contact Name: Wawrzynirc Banaszak; XArr Contact Name Gn: Wawrzynirc; XArr Contact Name Surn: Banaszak; XDep Contact Name: Josefa Lopacinska; XDep Contact Name Gn: Josefa; XDep Contact Name Surn: Lopacinska; XFs Unique Id: 1003039843351; XPr Arr Date: 24 Dec 1924; XPr Arr Dep Port: New York.
Though this man is too old to have children born in the 1960s, it's the closest record I found.
Another possibility:
Child Marriage: "Illinois, County Marriages, 1810-1940" Citing Argo, Cook, Illinois, United States, county offices, Illinois; FHL microfilm 2,342,909. FamilySearch (accessed 20 December 2021) FamilySearch Image Image number 00416 Lopacinski child marriage on 14 Apr 1925 in Argo, Cook, Illinois, United States. Names: Oscar Latimer and Josephine Lopacinski. Fetterly-28 10:53, 20 December 2021 (UTC)
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