John William Renner was born at 42 Durden Street in Liverpool, England in early 1881, being baptised in St Nathaniel’s Church on 6 May that year. He was one of several children born to John Ralph Renner, an engineer, and Lucy Cotter.
By 1901 John was described as an unmarried baker when he and his family lived at 177 Earl Road in West Derby. Shortly after that he went to sea and appears on crew manifests as early as 1904 when he was 4th baker aboard Cedric and Dominion.
In April 1912 Renner was serving as 2nd baker aboard the eastward-bound voyage of the Carpathia when that ship rescued the survivors of the Titanic.
John may have later left his seagoing career behind him; during WWI he served with the Royal Army Medical Corps but was later discharged as being unfit for service. He was married in Wavertree, Liverpool in August 1919 to Phoebe Robinson (b. 1895) and they had two children.
A late resident of 63 Taunton Street in Liverpool, John Renner died on 29 January 1952 and he was buried in Allerton Cemetery (section 2H, plot 362).