I am pretty confident you have the wrong family there George Stacpoole Lysaght had 18 children His eldest son George Lingard Lysaght married Mary Byrne and lived in Clare and then in Dublin. His son James Walter lived in New York and was married to a Bridget but his sons were George and Walter.
There are an awful lot of Lysaghts many called George. This branch are the Stacpoole Lysaghts and there are many message board posts on them if you google.
They were cousins of mine hence my interest