Brown of Sydney Australia

Seeking descendants of Michael Brown, an Aussie soldier, who m. Jessie Ross, in Edinburgh, Scotland during WW 1. Jessie was born in the late 1800's in Edinburgh, Scotland to parents, John Ross and Louise Slater. Jessie had 3 brothers, my father, John Ross, b. 1900, William Ross, and Bob Ross. Michael Brown and wife, Jessie, had 3 children, son Sydney Ross (born in Sydney when Michael and wife returned to Australia) and daughers Vi and Evelyn. Last heard from in mid 1940's. Vi was then married and had a young daughter about 4, and Evelyn was engaged to an American G.I.