Einstein's great-great-great-great-grandfather, Jakob Weil, was his oldest recorded relative, born in the late 17th century, and the family continues to this day.

[1] Albert's three children were from his relationship with his first wife, Mileva Marić, his daughter Lieserl being born a year before they married.

Pauline's father was from Jebenhausen, now part of the city of Göppingen, and grew up in modest economic circumstances.

After the wedding, the young couple lived in Ulm, where Hermann became joint partner in a bed feathers company.

The second child of Hermann and Pauline, their daughter Maria (called Maja), was born in Munich on 18 November 1881.

In 1903, Pauline went to live with her sister Fanny and her husband Rudolf Einstein, a first cousin of Hermann, in Hechingen, Württemberg.

In 1918, when visiting her daughter, Maria, and son-in-law, Paul Winteler, in Luzern, Pauline was taken to the sanatorium Rosenau, due to her illness.

At the end of 1919, Albert took his terminally-ill mother out of the sanatorium in Luzern and brought her to Haberlandstrasse 5, Berlin, to stay with him and his second wife, Elsa, where she later died the following year.

He had six siblings:[8] At the age of 14, Hermann attended the secondary school in the regional capital Stuttgart and was academically successful.

He had a strong affection for mathematics, and would have liked to study in this or a related area, but as the financial situation of the family precluded further education, he decided to become a merchant and began an apprenticeship in Stuttgart.

There, the two brothers founded the electrical engineering company Einstein & Cie, with Hermann being the merchant and Jakob the technician.

In 1893 the Einstein brothers lost a bid on a contract for the electrification of Munich to Schukert; Hermann and Jakob's small company lacked the capital to convert their equipment over from the direct current (DC) standard to the more efficient alternating current (AC) standard being used by Schukert.

They were forced to sell their Munich factory and, in search of business, the two brothers moved their company to Pavia, Italy in 1894.

After she passed her final exams, she studied Romance languages and literature in Berlin, Bern and Paris.

In 1909, she graduated from the University of Bern; her dissertation was entitled "Contribution to the Tradition of the Chevalier au Cygne and the Enfances Godefroi".

[14] After the Italian leader Benito Mussolini introduced anti-Semitic laws in Italy, Albert invited Maja to emigrate to the United States in 1939 and live in his residence in Mercer Street, Princeton, New Jersey.

Both "Lieserl" and "Hanserl" were diminutives of the common German names Liese (short for Elizabeth) and Hans.

adding "We must take precautions that problems don't arise for her later" may indicate the intention to give the child up for adoption.

The tone, content, and even the language of the circulated letter (appearing only in English) present as being incongruous with all other known Einstein correspondences to his family.

He was a long-time professor of Hydraulic engineering at the University of California, Berkeley, widely recognized for his research on sediment transport.

Shortly thereafter the parents separated, and Marić returned to Zürich, taking Eduard and his older brother Hans Albert with her.

His father remarried in 1919 and in 1933 emigrated to the United States under the threat of Germany's rising Nazi regime.

Biographers of his father have speculated that the drugs and "cures" of the time damaged rather than aided the young Einstein.

[31] His brother Hans Albert Einstein believed that his memory and cognitive abilities had been deeply affected by electroconvulsive therapy treatments Eduard received while institutionalized.

From then on Eduard lived most of the time at the psychiatric clinic Burghölzli in Zurich, where he died in 1965 of a stroke at age 55.