Hi, You are researching
Jan {John} ROMANOWSKI m. Helen MICHALSKI
Joseph C. ROMANOWSKI -m Marianne LUKASZEWICZ.
Living in New York.
Were the couples married in New York USA?

Perhaps John may also be found as Iwan/Ivan =John

What Information are you searching for ?
Is there a family connection in the Province of Saskatchewan ? in Canada ?
If in the USA - have you posted to the relevant US message boards ?

Where were the ROMANOWSKI brothers born?
If not in USA /Canada - Have you obtained Letter of Intent - Citizenship - from the State archive where application was made - or from the National Archive in Washington DC

Have you searched USA Census?

Registration of Death / Long form Death Certificate
Should show all personal information required at the time - as known to the informant. Date and Place of Birth - names of Parents including maiden name of mother etc.

Registration of Marriage / Long form Marriage Certificate
A more accurate document since the information comes directly from the bride and groom
Will show names of parents - including maiden name of mothers - place of birth etc.

From Family Search Org -Online
https://www.familysearch.org/
Perhaps?
Name: John Romanowski
Residence: Dunkirk, Chautauqua, New York
Age: 55
Estimated Birth Year: 1850
Birthplace: Prussia Poland
Relationship to Head of Household: Head
Race: W
Gender:
Family Number: 158
Page Number: 10
Line Number: 28
Film Number: 479649
Digital Folder Number: 4296227
Image Number: 00438
Gender Age
John Romanowski M 55y
Helena Romanowski F 49y
Child Joseph Romanowski M 26y
Child Andrew Romanowski M 20y
Child Frank Romanowski M 18y
Child Mary Romanowski F 15y
Child John Romanowski M 14y
Child Constance Romanowski F 11y
Edward Romanowski M 24y
Margaret Romanowski F 18y
Child Helena Romanowski F 1y
Peter Robietek M 30y
Caecitia Robietek F 25y
Child Mary Robietek F 3y
Child Francis Robietek F 1y
Child Stella Robietek F 5m
Cheers, Stella