Sorry, I don't find that tartan when searching Scotweb for "Jamaica." Is that one you designed?

There is no Jamaica tartan recorded with the National Register. The Scottish Tartans Authority has two Jamaica tartans recorded at Nos. 5290 and 5291, both designed in 1996 by Bill Johnson (USA). I don't know who wove them, or if indeed they were ever woven. Neither appear to have been officially adopted by Jamaica.