Sidney Frank Butlin, born in Stoke Newington, Middlesex on 19th June 1890, son of Arthur William Butlin an Accountant for the Railway and Charlotte Annie Butlin (nee Simmons). He was the youngest of 7 children, 2 of which died in infancy. Baptised on the 11th July 1890, in the Parish of North Hackney, London, with his sister May Violet Butlin, they were living at 17 Walford Road, Stoke Newington at the time.
1891 Census records Sidney aged 9 months living with his parents, brothers, Arthur 13, Stanley 11, Reginald 9, Max 5 and sister May 3, at 17 Walford Road, Stock Newington/Hackney. The family also had a live in Domestic Servant. It also records his father as a Railway Accountant and a Baritone Vocalist.
The 1901 Census records the family now living at 34 Tynemouth Road, Tottenham, Sidney is at school, his brothers, Arthur and Reginald are still living at home.
By 1911 Arthur and Charlotte were living at 44 Upper Paddock Road, Oxhey, Watford. All their children except Sidney, aged 20, and his older brother Max, aged 25, a Bank Clark, had left home. Sidney, like his father, was a railway accountant.