Sidney was born at Forest Gate, Essex, the eldest son of Albert and Emily (nee Johnson) of Ashwell, born on 10 May 1893. He was a pupil at the Merchant Taylors School in Ashwell.
Harry was born on 28 April 1900 at Ashwell, Hertfordshire, the eldest son of Frank and Mary Ann (nee Clements) Waldock of Silver Street, Ashwell, Hertfordshire. He was a pupil at the Merchant Taylors School in Ashwell.
Herbert was born in the 4th quarter 1893 at Ashwell, Hertfordshire, the second son of Benjamin John and Agnetta (nee Covington) Waldock of Ashwell. Herbert was a pupil at the Merchant Taylors School in Ashwell and before enlisting he was a baker in Shefford, Bedfordshire.