Georg Friedrich Jonas Frentzel (1754 - 1799) was a German master engraver from Leipzig. Nothing is published about his early life and education, but his surviving work is superbly detailed and well-executed. He is best known for having engraved one of the finest maps of Boston to be produced in the Revolutionary War period, his 1776 Carte von dem Hafen und der Stadt Boston; he also produced polar projections showing Cook's discoveries in the Pacific Ocean, and a monumental 20-sheet map of Bohemia and Saxony tracing the maneuvers of the War of the Bavarian Succession. All of Frentzel's work is rare on the market.