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Founded one of Britain’s longest-running publishing houses in the early 18th century, helping build a family firm that would become known as Longmans, Green & Co. His name is closely tied to the start of a company that shaped English-language publishing for generations.

by and Co. Green Longmans
Thomas Longman was an English publisher who founded the business later known as Longmans in London in 1724. The firm stayed under family control for much of its early history and eventually became widely known as Longmans, Green & Co.
Because the name "and Co. Green Longmans" points to a publisher rather than a conventional single author, the historical figure most directly connected with that name is Thomas Longman, the company's founder. His legacy is less about one famous book than about building a publishing house that lasted for centuries.
Longman’s importance in book history comes from that lasting influence: the company grew through later generations of the family and became a major presence in British publishing and education.