John M. Gaver, Jr. (1940–2002), American thoroughbred racehorse trainer
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John M. Gaver, Sr. (1900–1982), American thoroughbred racehorse trainer
Ronsburg was the author of Horah Gaver (Prague, 1802), commentary on the tractate Horayot, and Ma'aseh Rab (ib. 1823), marginal notes on the Talmud, reprinted in the Prague (1830–32) edition of the Talmud and in several later ones.
Born in Mount Airy, Maryland, John Gaver graduated from Princeton University then worked as a prep school language teacher before eventually embarking on a career in Thoroughbred racing.