Ludwik Rajchman, founding chairman of UNICEF and director of the League of Nations Health Organization, was the father of RCA engineer Jan A. Rajchman

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Ludwik Rajchman (1881–1965), a Polish physician and public-health administrator, directed the League of Nations Health Organization from 1921 and, in December 1946, became the founding chairman of UNICEF, serving unpaid until 1950. Wikipedia states plainly that "Ludwik Rajchman is the father of Jan A. Rajchman, a Polish computer scientist, inventor of magnetic-core memory" — the same Jan A. Rajchman whose 1950 RCA patent application predates Jay Forrester's 1951 filing and forced the legal contest over Forrester's core-memory inventor status (see claim-rajchman-rival-filing-forced-legal-contest-over-forresters-inventor-status).

The connection is incidental to the patent dispute itself — nothing about the RCA filing turns on who Jan Rajchman's father was — but it links two otherwise unconnected corners of the vault: a mid-century computing-hardware patent fight and the founding of a major UN institution, joined only by a household. A separate, named-author account of Ludwik Rajchman's UNICEF founding and public-health career independently corroborates his biography, though not the father-son claim itself, which rests on Wikipedia alone.

A further lead located at audit (2026-09-13): a Linda Hall Library "Scientist of the Day" piece on Jan Rajchman by Benjamin Gross (2020-08-10, https://www.lindahall.org/about/news/scientist-of-the-day/jan-rajchman/) reportedly states that Jan's father, Ludwik Rajchman, "was a bacteriologist who later served as the first chairman of" UNICEF — an independent, named-author corroboration of the pairing, but read only through a summarizing fetch, so it carries [unverified-quote — needs direct read] until a session reads the page raw.