Connelly in Newcastle/four mile water

I am hoping to make contact with a genealogist in the area or a member of the remaining Connelly family in this part of the world who may have family history s/he'd be willing to share.

Unfortunately, I have almost nothing to go on from the States.

John Connelly, whose mother was a Fitzgerald, was born and, presumably, raised in Waterford (County?)

He emigrated to the US around 1861,fought in the American Civil War, married Mary Ellen Donahue Cronin(originally from {County} Cork) in Philadelphia in 1871 and started the family of which I am a member.

I recently came across abaptismal record for a John Connelly, baptised 11 May 1845. he was born to John Connelly and Johanna Fitzgerald of the parish Newcastle. Their address was Touracurra.John and Johanna were married in Newcastle on 29 April 1838. They also raisedBrigid Connelly (baprtised 10 July 1839.) It appears that John Connelly Sr died 1 October 1887 in Clonea.

While this would have made John Connelly Jr awfully young to have emigrated in 1861, I am wondering if there is any way to verify what did happen to the John connelly of newcastle.

Many thanks

Christopher Connelly