Cuthbert Snowball Rewcastle (21 February 1888 – 8 June 1962), was a British judge and Liberal Party politician.
In 1926 he married Dr Attracta Genevieve Candon, who went on to become the first female commissioned officer in the Royal Navy.
It remained a marginal in both 1910 General Elections before being the vehicle that propelled Liberal H. A. L. Fisher into parliament as a supporter of the Lloyd George coalition.
In 1918 Fisher chose not to defend this seat and a coalition supporting Unionist was returned unopposed.
By the 1922 election, the Coalition Government had ended and in Hallam, the party political battle between Unionist and Liberal was resumed after 12 years.