Born: August 1958, Upington, South Africa.
Marianne is the daughter of Reverend Jean Raath.
She earned her BMus degree at University of the Orange Free State, Bloemfontein, in 1980, as well as a Diploma in Sacred Music.
After marriage, she was an organist at various churches, and still serves in her local congregation in the South Cape.
She helped compile a new hymnal for People of the Covenant in South Africa in 2005, during which she translated existing hymns and wrote new ones.