Elsa Einstein (18 January1876-20 December1936) was the wife and cousin of Albert Einstein. She was the daughter of Rudolf Einstein and Fanny (née Koch) and was born in Hechingen, Germany.[1] She married firstly a textiles trader from Berlin, with whom she had three children, but from whom she was divorced by 1908.[1] Albert Einstein was her second husband, whom she married in 1912.[1] With daughters Ilse and Margot (the third child had died by now) the Einsteins were a close-knit family. Although Albert and Elsa never produced any children of their own, Albert raised Ilse and Margot as his own. They lived in the Berlin area, also having a summer house in nearby Potsdam, although by 1933 they had emigrated to Princeton, New Jersey, USA.[1] January 18 is the 18th day of the year in the Gregorian calendar. ... 1876 (MDCCCLXXVI) was a leap year starting on Saturday. ... December 20 is the 354th day of the year (355th in leap years) in the Gregorian calendar. ... 1936 (MCMXXXVI) was a leap year starting on Wednesday (link will take you to calendar). ... Albert Einstein ( ) (March 14, 1879 â April 18, 1955) was a German-born theoretical physicist widely considered one of the greatest physicists of all time. ... Burg Hohenzollern Hechingen is a town in the Zollernalbkreis, Baden-Württemberg, Germany. ... Berlin is the capital city and one of the sixteen states of the Federal Republic of Germany. ... 1908 (MCMVIII) was a leap year starting on Wednesday (link will take you to calendar). ... 1912 (MCMXII) was a leap year starting on Monday in the Gregorian calendar (or a leap year starting on Tuesday in the 13-day-slower Julian calendar). ... Potsdam is the capital city of the state of Brandenburg in Germany. ... Year 1933 (MCMXXXIII) was a common year starting on Sunday. ... Nassau Street, Princetons main street. ...