Evangeline Mary Whitcombe was born in Soho, London, the daughter of an architect, Arthur Whitcombe, and she is thought to have been an artist. Eva, as she was known, married artist George William OSTREHAN in the Parish church of Soho, St Mary the Virgin in June 1890. The couple were resident at Vine Cottage, Newlyn, at the time of the 1891 Census. In 1893, they had returned to London where they worked from Abbey Studio in Campden Hill Road, Holland Park Mansions (1894), Wildwood Corner in Hampstead (1895), before moving to Sunbury-on-Thames, where she died in 1933.

She exhibited at the Royal Academy after her husband's early death at age of 35.  The nature of her artistic expression is not as yet known.