I have researched a family living in Greenpoint Brooklyn:
Patrick Cassidy b. 20 Sept. 1821 Parish Balllyscullin, County Derry
married NYC ca. 1849 worked as a rigger
Mary Unknown born 1826 Derry owned a grocery
Children, born in NYC and Brooklyn:
Catherine b. 1849
Rosanna b. 1851
Sarah M. b. 25 NOv. 1853
John b. 1856
Margareth b. 21 Aug. 1859
Lousia b. 1863
I also have living in Greenpoint:
John Cassidy b. 15 Feb 1824 married to Catherine
Children:
John b. 2 Mar 1851 Ireland
Patrick b. 1859 Ireland
Catherine b. 1859 Ireland
Michael b. 10 May 1861 d. 1881
Rose b. 1864 Ireland d. 13 Mar. 1896 Brooklyn married Michael Ryan 5
Jan 1888 Brooklyn
Mary b. 1866 Ireland
I also have living in Greenpoint:
Michael Casidy b. Nov. 1865 d. 16 Jul 1937 Brooklyn marries Elizabeth
McAuley [McCauley]
Children all born Brooklyn:
Catherine b. 1891
Thomas b. 1893
Michael b. 1896
John b. 1898
William b. 1902
Joseph b. 1904
Anna b. 1907
And two sisters:
Alice Cassidy b. 1862 County Cavan daughter of Abdrew Cassidy and
Alice McDonald
She marries Jeremiah O'Keefe b. 1868
Children:
Beranrd
Mary
Jeremiah Augustin
Her sister Mary Cassidy never marries; she is born 1870 County Cavan