My wife's Grandmother was a Rushbrooke. A branch in her tree has a Thomas Rushbrooke b 1853, died in 1936. He was a medical doctor(medical student at time of 1881 census living at Amphill Bedfordshire). He married Louisa Penhall who died 1928. They had two sons, Lancelot Arthur Rushbrooke b 1887 and Montague Penhall Rushbrooke b 1891. Montague married Vera Louise ???. Lancelot had a son Guy Rushbrooke.