I am trying to find my great grandmothers' maiden name.

Her married name was Jessie Emma Adelle Mansfield. She died on 28 September 1942 at 22 Bowling Green Road, Casteltown aged 42 years. Her husband worked in India and I believe that she spent most of her life with her mother "the baroness?" at her house outside Casteltown. My grandfathers sister predeceased their mother sometime around 1940 aged about 16.

I would really appreciate some help.