My great grandfather Patrick Folliard born 1/1865 came from Roscommon in 1884 to Brooklyn Kings New York. His wife Annie born 1866 immigrated in 1884 too. They had 3 sons listed on the 1900 census including my grandfather Robert J. Folliard dob 11/15/1897 brother Thomas 2/1895 and John 4/1900. In the 1910 census the three sons are in the Washington DC Census but now their mother is listed as Nora Gannon and she is a widow. There is now a 4th son born Alphoncias 8/2/1902. Can't find Patrick or Annie in 1910.
I remember seeing a Wahsingtonian Magazine article in the late 70's or early 80's on the irish in DC. There was a mention of Folliard's and Gannons. I believe they referred to the Folliards as the "Foggy Bottom Folliards". At that time my grandfather said they were not closely firstname.lastname@example.org