Hyllus Maris was born into the Yorta Yorta tribe, the original inhabitants of the River Murray area and traditional owners of that region. She also had Wurundjeri heritage. As a child Maris participated in the walk-out from Cummeragunha, a Government Mission. That event inspired an episode in Women of the Sun (1981). A sociologist and prominent activist in Aboriginal community development, Maris was the founder of Worawa College, Frankston, the first Aboriginal school in Victoria, and initiated several other Aboriginal organisations.