Mr Martin McMahon was born in Cragbrien, Co Clare, Ireland on 17 February 1893.
He was the son of Anthony McMahon (b. 1837), a labourer, and Honor Meaney (b. circa 1842), Clare natives who had married in Kilchrist, Co Clare on 15 February 1871.
One of fourteen children seven surviving infancy, Martin's known siblings were: John (b. 25 December 1871), Maria (b. 15 May 1873), Bridget (b. 5 February 1875), Patrick (b. 26 April 1879), Michael (b. 1886), Edmond (b. 1890) and Margaret (b. 27 October 1894). They were a Roman Catholic family fluent in both Irish and English.
He appears on the 1901 census living with his family at 10 Cragbrien, Lisheen, Co Clare but he would be absent from the family home, 14 Cragbrien, Lisheen, by the time of the 1911 census. He was listed elsewhere as an unmarried farm servant living at 1 Cloonmore, Lisheen, the home of a Bridget Hurley and her adult son Thomas.
He boarded the Titanic at Queenstown on 11 April 1912 (ticket number 370372 which cost him £7, 15s) and his destination was 415 West 53rd Street, Manhattan.
Martin McMahon died in the sinking and his body, if recovered, was never identified. Local media at the time related that he was a well-known and well-liked young man who exhibited promising athletic abilities.
A telegram received in Ennis during the week confirmed the worst fears that had been entertained as to the safety of a young man named Martin McMahon, from the Craigbrien district, about five miles from Ennis. It was known that he was a passenger on the ill fated boat, and though his name did not appear in the list of survivors, it was hoped he might have been rescued, but it is now definitely stated he has been lost. He was a fine athletic young man and very popular in his native district. It is said that some West Clare people were on board, but our enquiries failed to trace their names and addresses. - The Clare Journal, 29 April 1912
His parents remained in Cragbrien and his father later battled with senility; he passed away on 31 January 1917 aged 80. His mother also became afflicted with the same ailment before her death on 9 September 1923.