British etcher and watercolorist. Member of the British Watercolor Society. Trangmar studied at Brighton School of Art and then the Royal College of Art. He became an art teacher and later Headmaster of Salisbury School of Art, the Principle of Ealing School of Arts and Crafts, living in Cambourne Avenue, London. He exhibited between 1927 and 1932, showing work at the Royal academy and the Royal Society of British Artists.
Trangmar was a soldier in British Army at the Macedonian front, produced several etchings from Kratovo, Strumica, Dojran Lake. The etchings “Macedonia” and “In Old Serbia” are in the collection of the author of this lexicon. Additionally, the artprice.com auction web site gives information that he has produced the etching titled: “Kato Krusowec, Lower Struma, Macedonia 1919” sold by the auction house Biddle & Webb, Birmingham, (UK) on 9th of January 2000, (lot number 187).