Elsa Einstein

Elsa Einstein was the second wife of Albert Einstein. Elsa had the surname of Einstein at birth, lost it when she took the name of her first husband Max Lwenthal, and regained it in 1919 when she married her cousin Albert.

Elsa, the daughter of Rudolf Einstein, was born in Hechingen in January 1876. She had two sisters Paula and Hermine . Rudolf was a textile manufacturer in Hechingen. During the regular visits with the family in Munich, she often played with her cousin Albert. In her Swabian dialect, she called him Albertle. The two parted ways in 1894, when Albert left Germany to follow his family to Milan.

Source: Wikipedia