You probably have most of this, but it didn't take long to find so no harm done.
Is this Eliza (Delaney) Breslin, d Dublin, 1867 age 55?
https://www.familysearch.org/ark:/61903/1:1:FRPY-CM8I didn't check the civil records
I didn't find anything for Ephraim Breslin, father of the family, at familysearch.
Children of Ephraim and Eliza (Delaney) Breslin:
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Maybe 1880 Census in Boston for Thomas Breslin, with a son Ephraim, born 1875
https://www.familysearch.org/ark:/61903/1:1:MHXB-Z4YMaybe Thomas' death 27 September 1883, Boston
https://www.familysearch.org/ark:/61903/1:1:FHHJ-LNR- it's the same man, anyway, so if one is right the other is.
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Daughter Eliza Nora's death, 24 Feb 1915, 509 West 54th, NYC
https://www.familysearch.org/ark:/61903/1:1:2WHL-PDX-------------
Son Niall's death, 28 July 1922, Bronx
https://www.familysearch.org/ark:/61903/1:1:2WL5-89B----------
Daughter Mary Kate (Breslin) O'Sullivan's death 17 December 1933, Manhattan
https://www.familysearch.org/ark:/61903/1:1:2WKJ-SM9----------
Son Michael's marriage, 25 September 1872, Manhattan
https://www.familysearch.org/ark:/61903/1:1:249V-92Ralso
https://www.familysearch.org/ark:/61903/1:1:F677-78S----------
Son John J Breslin's death, which you have, 18 November 1887, Manhattan
https://www.familysearch.org/ark:/61903/1:1:2WYN-JGY-------------
? Son Patrick's death, 19 December 1914, Manhattan, no mother's name but age at death matches
https://www.familysearch.org/ark:/61903/1:1:2WHX-WMZburied in Holy Cross, Brooklyn, so another cemetery to look through for Breslins
he is not at findagrave
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Grandchildren?
There are 46 or so Breslins in Calvary Cemetery, including John James. Are any part of the family?
This first name stood out, maybe 3rd generation?
Ephraim J. Breslin
Birth 1875
New York, USA
Death 24 Jun 1901 (aged 25–26)
Manhattan, New York County (Manhattan), New York, USA
Burial
Calvary Cemetery
Woodside, Queens County, New York, USA
Memorial ID 106683733
https://www.findagrave.com/memorial/106683733/ephraim-j_-breslinThere is also a Thomas Nial Breslin (1880 - 6 Feb 1932)
https://www.findagrave.com/memorial/111521055/thomas-niall-breslin--------------
possibly Ephraim Breslin III, death age 50 on 17 May 1915, Manhattan
https://www.familysearch.org/ark:/61903/1:1:2WHV-DLN