http://www.hort.purdue.edu/newcrop/morton/tangor.html 'Ortanique'–believed to be a chance cross of sweet orange and tangerine; discovered in the Christiana market, Jamaica, by a Manchester man named Swaby who bought 6 fruits. Of resulting seedlings, 2 bore fruit true to type which were exhibited at an agricultural show in the early 1900's. A man named C. P. Jackson, from Mandeville, bought 2 fruits, planted 130 seeds. Some of the seedlings were very thorny. Jackson selected the least thorny, least seedy, and named the fruit–a contraction of orange, tangerine, and unique. The Citrus Growers Association took charge of the marketing for export in 1944.