Leonard was the tenth son of Joseph and Emily (Nee Austin) Haylock, born at Ashwell on 18 March 1881. He was a pupil of the Merchant Taylors School in Ashwell.
Charles was the third son of Thomas Priest Maddams and Kate Elizabeth (nee Cowley) Maddams, born at Biggleswade, Bedfordshire on 13 April 1885.
Harry was the eldest son of Thomas Priest Maddams and Kate Elizabeth (nee Cowley) Maddams, born at Brighton, Sussex on 14 May 1879.
Peter was the third son of Stephen and Charlotte (nee Waldock) Waldock, born in the 3rd quarter 1876 at Ashwell, Hertfordshire. He was a pupil at the Merchant Taylors School in Ashwell.