I am trying to find the parents & G.Parents of Gertude Mary Brobyn b1870 FOD and her sister Ethel. Can anyone please help?

From Littledean School admissions register. Gertrude MNry Brobyn, admitted 2 Nov 1891, born 19 April 1882 dau. of Edward & Elizabeth Brobyn. Ethel Brobyn admitted 29 Apr 1895 born 2 Jul 1888, parents as above. Edward mar. Elizabeth Kibble 1871,they had many chidren. My maiden name was Brobyn & I have more details of above in my extensive card index & many Brobyn contacts. P. Harwood.