Richard Rado FRS[1] (28 April 1906 – 23 December 1989) was a German-born British mathematician whose research concerned combinatorics and graph theory.

[3][4][5] He was interviewed in Berlin by Lord Cherwell for a scholarship given by the chemist Sir Robert Mond which provided financial support to study at Cambridge.

Rado made contributions in combinatorics and graph theory including 18 papers with Paul Erdős.

He rediscovered it in 1964 after previous works on the same graph by Wilhelm Ackermann, Erdős, and Alfréd Rényi.

The Milner–Rado paradox, also in set theory, states the existence of a partition of an ordinal into subsets of small order-type; it was published by Rado and E. C. Milner in 1965.