Princess Johanna Marina Eleoore of Hesse was orphaned at the age of fourteen months, when her family was killed in a plane crash, when the plane they were in hit what? 
Princess Johanna of Hesse and by Rhine:  She was orphaned at the age of fourteen months when her parents, older brothers Ludwig and Alexander and paternal grandmother Eleonore were killed in a plane crash on their way to a family wedding in London.
i don't know