I am aware of the family you mention, however the your Eugenie is new to me, assumed daug of - Thomas and Ann Elizabeth Douthwaite (Eland)
Regarding Knaptons, was born 1803 to Charles, who was thought to live 1770 to 1852 - and I believe Charles' parents were William Knapton and Elizabeth Hassell (m.1765)
I am still trying to find how my family tree links in with that of the 'Elands of Bubwith' that are already documented - knowing about how the Brownbridge name came to be in the family still interests me though!
Thanks, jon