Mike, I have heard the name Barrow Cadbury - where did the Barrow name come from? I always assumed it was a 'first' name. Also do you know if Rokesley House had a lodge?The Cadburys may have only bought Rokesley in 1924, but in 1912 it was owned by Mrs Barrow, so it probably had some connection to the Cadbury family then.
Mike