Albert Einstein was raised in a secular Jewish family and had one sister, Maja, who was two years younger than him. In 1903 Einstein married Milena Maric, a Serbian physics student whom he had met at school in Zürich. They had three children: a daughter, named Lieserl, and two sons, named Hans and Eduard. After a period of unrest, Einstein and Maric divorced in 1919. Einstein, during his marriage, had begun an affair with his cousin Elsa Löwenthal. They were married in 1919, the same year he divorced Maric.