Lieserl

Lieserl was the reported first child of Albert Einstein and Mileva Marić. Born around 1901 in Novi Sad, then part of the Austro-Hungarian Empire (now Serbia), her existence is known primarily through letters exchanged by the couple in the early 1900s. In those letters a child named Lieserl appears, but details about her birth and subsequent life are sparse.

The fate of Lieserl is uncertain. Most historians believe she died in infancy or was given up for adoption in the early 1900s. There is no confirmed record of Lieserl after about 1903, and she is not mentioned in Einstein’s later personal writings or in later biographical accounts that cover his adult life.

Scholarly assessment of Lieserl rests on a limited documentary foundation: the surviving correspondence between Einstein and Marić from the early 1900s. Because no definitive records survive, Lieserl's life remains unclear, and there is no consensus among historians. The subject has been the focus of speculation and biography, but conclusions drawn about her fate are tentative.

The name Lieserl is commonly treated as part of the historical record of Einstein’s early life, though its exact origin is debated. Some scholars consider Lieserl a diminutive of Elisabeth or Lieschen, while others treat it as a standalone given name used by the couple. Regardless, Lieserl’s place in Einstein’s biography is as a largely unresolved episode from the couple’s early years.

In summary, Lieserl is recognized as the couple’s early child through archival letters, but the details of her life and fate remain unknown, making her a minor and uncertain thread in the broader narrative of Albert Einstein’s life.