John Essex was a choreographer, born in 1680, who died in 1744.
Biography
John Essex (c. 1680 – 1744, London) was an English dancer, choreographer and writer who promoted the recording of dance steps through notation as well as performing in London theatre. In 1728 he published his major work The Dancing-Master, or, The Art of Dancing Explained, a translation of Pierre Rameau's Le maître à danser (1725).
From the Wikipedia article “John Essex”, licensed under CC BY-SA 4.0.
Facts from Wikidata (Q6231928), CC0.