Do you believe what you read on Yahoo! Shine? You shouldn’t.
Dree Hemingway isn’t the granddaughter of Ernest Hemingway; her mother, Mariel Hemingway is. That would make her the author’s great-granddaughter. And the model didn’t appear in a campaign for Jean Paul Gautier (at least, not that we know of); she appeared in a campaign for Jean Paul Gaultier.