Mata Hari: Mata Hari. Born Margaretha Geertruida Zelle on August 7 1876, the only daughter of a Dutch hat-maker, she seemed unlikely to later become the Mata Hari, the most infamous double agent in spy history. She answered an advertisement in the local paper placed by Rudolph MacLeod, a career military man in need of a wife. Enchanted by the tall, dark, and lovely Margaretha, MacLeod married her in 1895, and moved...