Albert Einstein had three children with Mileva Maric. Their first child, a daughter named Lieserl, was born out of wedlock in 1902 and given up for adoption. Einstein and Maric married in 1903. Their marriage produced two sons: Eduard, born in 1910, and Hans Albert in 1914.
Lieserl is believed to have died at the tender age of 21 months. Eduard was diagnosed schizophrenic and admitted to a mental hospital in Zurich, Switzerland at the age of 38. Hans Albert studied at the Swiss Federal Institute of Technology in Zurich and became a hydraulic engineer.
Einstein's second marriage was to his first cousin Elsa Einstein-Lowenthal. He was stepfather to her two daughters, Ilse and Margot.