Slygirl on Family Tree Circles

Looking for roots in Ireland. My Sanderson line came to America in 1804 and settled in Bloomfield NJ. Father Robert widowed, sons Arthur and William and their families. Wlliam's wife named Sidney, Arthur's wife Margaret, she died in May 1869. Lots of Arthur's and Williams in the family. I come from Arthur's line. Hope to find some of William's line.

Name: DOB: Birth Place: Death Place
Arthur Sanderson 05/04/1848 Jersey City 17/11/1920 NJ
Spouse:
Charlotte Scott 19/10/1854 New York 30/03/1938 NJ
GGG-Father
William Sanderson 02/01/1820 Jersey City 24/02/1883 NJ
Spouse:
Emaline Bush 05/04/1848 Jersey City 25/07/1894 NJ
GGGG-Father
Arthur Sanderson abt. 1780 Ireland Bef. 1848 NJ
Spouse:
Margaret abt. 1774 Ireland 23/05/1869 NJ

Update: Found 3 Sanderson's came to the United States on August 10,1804. Robert,age 69 widower, William age 46 with wife and children, Arthur age 43 with wife and children. They were listed in "British Aliens in the United States During the War of 1812" Compiled by Kenneth Scott 1979,
I am still looking for the name of the place in Ireland where they came from.