Waldorf, Maryland General Assembly of Maryland by an act changed the name to "Waldorf" in honor of William Waldorf Astor (1848–1919), the great-grandson of John Jacob Astor (1763–1848), who was born in Walldorf, Palatinate, Germany. On July 29, 1908, the city of Plumb Valley in Waseca County, Minnesota, changed its name to Waldorf after Waldorf, Maryland. Once a tobacco market village, Waldorf came to prominence in the 1950s as a gambling destination after slot machines were legalized in Charles County in 1949. The boom lasted until 1968 when gambling was once again outlawed. Its subsequent substantial growth as a residential community began
Astor Library teaching career and enter the family of Samuel Ward, a New York banker. Three of Ward's sons had been pupils at Round Hill School which Cogswell had administered. Ward introduced Cogswell to John Jacob Astor, who by then was in his 70s and had been retired for about 10 years. As the richest citizen of the United States, German-born Astor was considering what sort of testimonial he should leave to his adopted country. Early in January 1838, Astor consulted Cogswell about the use of some $300,000–$400,000, which he intended to leave for public purposes. Cogswell urged him to use it