Theodosius Forrest (1728 – 1784) was an English author, balladeer, playwright and lawyer.
He studied drawing under George Lambert, and until a year or two before his death exhibited at the Royal Academy annually from 1762 to 1781.
He entered his father's business; and became a steady solicitor, though with a passion for music.
[1] Towards the close of his life Forrest was afflicted with a painful nervous disorder, attended with a black jaundice.
He was thrown into a condition of deep melancholy, and on 5 November 1784 killed himself at his chambers in George Street, York Buildings, London.