James Flynn from Waterford to Philadelphia, USA in mid-1850's

Hello, I am researching my Irish roots with great difficulty from Baltimore, Maryland, USA.  However, I recently learned that my gg grandfather, James J Flynn, may have come from County Waterford.  He was born c. 1830, emigrated to the US in c. 1853.  He married Ann Rooney, possibly from County Kildare.  Not sure if where they married, but current working assumption is that they married in Liverpool in November 1851.  He was a brushmaker in Philadelphia, and is found there with his family as early as 1857 in City Directories and as early as 1860 in the U.S. Federal Census.  James Flynn and Ann Rooney had nine children, all of whom were born in Philadelphia, Philadelphia County, Pennsylvania, USA.  Their names were: John (born c. 1853), Mary Elizabeth (c. 1855), Thomas (c. 1857), Ann (1859), Margaret Mary (1860), James S (1865), Joseph John (1866), Catherine Clare (1867), and Agnes (1869).  Ann Rooney Flynn died on October 5, 1894 in Philadelphia.  James J Flynn died on November 22, 1886 in Philadelphia.

I have researched the records at the Irish Family History Foundation and have found many James Flynn's in County Waterford between 1820 and 1830.  I do not know his parents' names, but it is possible that they are Thomas and Margaret.  I have obtained the R.C. Church Baptism records for all of the relevant James Flynn's in County Waterford, including those in Parishes St. John's, Trinity Without, St. Patrick's, and Lismore.  I am in need of someone who may recognize this family. 

Does this family sound familiar to anyone?

Many thanks,

Ann Marie