Josephine Einstein and Siegfried Schwarzschild had no children.

Evidence

Josephine explicitly answered that she had no children in both her sworn 1939 declaration and 1944 naturalization petition, after the end of her childbearing years. The Stuttgart memorial biography independently describes the marriage as childless.

People

Josephine Einstein Schwarzschild Stone, Siegfried Schwarzschild

Places

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Family lines

Fellheim–Laupheim Einstein

Supporting sources

Josephine Schwarzschild naturalization file and legal name-change order, Siegfried Schwarzschild, Klopstockstr. 34A

Contrary sources

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What remains uncertain

No contrary child or descendant evidence appeared in the reviewed branch records.