Mr John J. Lamb 1 was born in Ballyboden, Rathfarnham, Dublin, Ireland on 9 February 1881.
He was the son of John Lamb (b. 25 December 1838), a provisions dealer, and Maria Quinn (b. circa 1839)2 who had married around 1869.
He had three surviving siblings: Catherine Theresa (b. 18 September 1872) and twin brothers Patrick and Martin3 who were born 15 minutes apart on 20 June 1876. Another sibling, Marianna (b. 30 April 1869), apparently died at a young age.
His mother fell ill with pneumonia only a few weeks after his birth; after a three-week long fight she died at age 42 on 16 April 1881. His father never remarried.
The remaining family had, according to naturalisation records, arrived in the USA on 2 June 1883 and later settled in Providence, Rhode Island; they appear on the census taken in 1885 at an unspecified address in that city.
The 1900 census shows that John's widowed father had taken in his unmarried sister Margaret (b. 1845) to help in the running of their home, then at Nichol's Street, Providence. His father passed away on 27 October 1909 aged 70.
By the time of the 1910 census was John recorded as living with his two unmarried brothers and his aunt Margaret; he was described as an unmarried jewellery employee, his address still Nichol's Street. His sister, Mrs John Andrew Lyons, was a resident of 92 Nichols Street in Providence.
In September 1911 John had accompanied his aunt Margaret Lamb to their native Ireland, visiting her birthplace in Co Wicklow. On 11 April 1912 he wrote to his sister notifying her that he was returning home alone aboard Titanic. He boarded the ship at Queenstown as a second class passenger (ticket number 240261 which cost £10, 14s,2d) and was one of a small number of Irish passengers not travelling third class.
John Lamb died in the sinking and his body, if recovered, was never identified.
Both his brothers Martin and Patrick seemingly were never married and were shown on the 1920 census still living with their sister Catherine and her family in Providence. The 1935 census shows both the brothers still unmarried, living at 78 Woodbine Street in Providence. What became of them is unknown.