Stefanie Rabatsch (née Isak; 26 December 1887 – 22 December 1975) was an Austrian woman who was allegedly an unrequited love of then-teenage Adolf Hitler, a claim made by Hitler's childhood friend August Kubizek. Her Jewish-sounding maiden name, Isak, has been subject to speculation in this context. However, there is no evidence apart from Kubizek that Hitler ever had such an attachment. Kubizek, a childhood friend and later biographer of his childhood experience with Hitler, wrote about Stefanie in his book, Adolf Hitler, My Childhood Friend. He alleges that Hitler fell in love with her after