John Duggan was born in Kilcummin, outside Killarney, County Kerry, Ireland, in 1881, the son of John and Margaret Duggan. He resided at 38 Craddock Street, Kirkdale, Liverpool.
He was employed on the Lusitania as a trimmer in the Engineering Department and he was killed when she was sunk.
His body was not amongst those recovered and identified afterwards and consequently, he is commemorated on the Mercantile Marine War Memorial at Tower Hill, London.He was aged 34 years, although when signing on for the voyage, he claimed to be only 31 years.
The Liverpool and London War Risks Insurance Association Limited granted a yearly pension to Margaret Duggan to compensate her for the loss of her son on whom she must have been some way financially dependent upon. This amounted to £5-11s-8d (£5.58½) which was payable at the rate of £0-9s-4d (£0.46½) per month.
1911 Census of England and Wales, Commonwealth War Graves Commission, Cunard Records, UniLiv. PR 13/24, PRO BT 334.