Billionaire Gina Rinehart and Daughter Ginia

Billionaire Gina Rinehart and Daughter Ginia

Ron D'Raine/Bloomberg

Ginia, left, at 27 the youngest sibling, has supported her mother Gina, right, and sought to have an independent trustee named, determined by either ANZ Trustees, a unit of Australia and New Zealand Banking Group Ltd., or National Australia Trustees, a unit of National Australia Bank Ltd.