Zadok Magruder (1729–1811) was an influential American politician and military officer who played a significant role in the establishment of Montgomery County, Maryland. Born to a family with a history of farming, merchants, and mechanics, Magruder inherited 600 acres in Montgomery County and became a prominent figure in the region. During the American Revolution, he served as a colonel in the Maryland militia and was involved in various committees, including the General Committee to Annapolis and the Maryland Committee of Correspondence.Following the war, Magruder and his brother were appointed as commissioners to organize and establish the government of Montgomery County. He and his wife had eleven children, and their legacy is commemorated by a high school named after him in Derwood, Maryland. The Mount Pleasant house, where he lived and owned enslaved African Americans, continues to stand as a testament to his historical significance.Today, the contributions of Zadok Magruder are remembered and honored, with his name immortalized in the educational system and the history of Montgomery County, Maryland.

Zadok Casey (March 7, 1796 – September 4, 1862) was an influential American politician and the founder of Mount Vernon, Illinois. Born in Greene County, Georgia, he moved to Illinois in 1817 and played a key role in the city's establishment. Known for his involvement in various political positions, Casey served as a U.S. representative from Illinois, as well as the fourth Lieutenant Governor of Illinois. During his time in Congress, he was instrumental in securing a land grant for the creation of the Illinois Central Railroad. Despite his political career, Casey also had a significant impact on the religious landscape, helping to establish the Society of the Methodist Episcopal Church in Mount Vernon and preaching its first services. His legacy is commemorated in the naming of Caseyville, Illinois, as well as Casey Creek and Casey Middle School in Mount Vernon. Zadok Casey passed away in Caseyville, Illinois, leaving behind a lasting imprint on the state's history.

Zadok Cramer (1773–1813) was an influential figure in the early 19th century United States, known for his work as an author, publisher, printer, and bookseller in Pittsburgh, Pennsylvania. Cramer's most renowned publication, The Navigator, provided crucial guidance for settlers and travelers navigating the Ohio and Mississippi Rivers. Born in New Jersey, Cramer honed his bookbinding skills in Washington, Pennsylvania, before establishing his bookstore in Pittsburgh in 1800. His first publication, an almanac for the year 1801, was soon followed by his notable work, The Navigator. Cramer's almanacs, which were published for 27 years, contained valuable local historical information and practical advice for river travelers. The Navigator, which went through twelve editions in less than 25 years, provided detailed navigation guidance for the Ohio and Mississippi Rivers, proving to be an indispensable resource for merchants and immigrants passing through Pittsburgh. Cramer's success in the publishing industry made him widely recognized and his works were often plagiarized by other authors, solidifying his reputation as a key figure in the early American publishing landscape.