John Kavanagh was born on 20th June 1899 at Gregg's Hill, Arklow, to John (Jack) Kavanagh and Julia Loughlin.
His birth was registered on 5th July 1899 by Anne Fearon of Hall's Lane, who was present at the birth.
Two-year-old John was living with his parents in a one-roomed, thatched cabin at Gregg's Hill.
By 1911, the family had moved to Money Big, where John was listed residing in a three-roomed, slate-roofed house alongside his parents and siblings; John, Terence, Elizabeth, Maria, Thomas, Esther, Annie and Maryanne.
Twenty-six-year-old John was living with his parents, Jack and Julia, and three of his siblings - Maria, Thomas and Esther - in Arklow.
He was unmarried and working locally as a publican's porter for J. Raferty, a publican based in Arklow.