The Tonkinese breed traces its roots to deliberate crosses between the Siamese and the Burmese, two of Southeast Asia's most celebrated feline lines. While the modern breeding program began in the 1960s, cats matching the Tonkinese description appeared in Western cat fancy literature as far back as the early twentieth century. Wong Mau, the foundation cat of the Burmese breed brought to the United States in 1930 by Dr. Joseph Thompson, is widely believed to have been a Tonkinese-type cat, a natural hybrid exhibiting traits intermediate between the Siamese and Burmese.
Canadian breeder Margaret Conroy is credited with launching the first intentional Tonkinese breeding program in the 1960s. Working with a sable Burmese and a seal point Siamese, Conroy sought to produce a cat that combined the moderate body type and warm personality of the Burmese with the striking coloring and vocal nature of the Siamese. The resulting kittens displayed the distinctive mink coat pattern that would become the breed's hallmark, a soft, rich coloring with subtly blended points.
Around the same time, American breeder Jane Barletta was conducting parallel crosses in New Jersey, unaware of Conroy's work in Canada. When the two breeders discovered each other's programs, they joined forces to establish a consistent breed standard. Their collaboration proved essential in building a large enough gene pool to sustain the breed and present a unified case to registering bodies.
The breed was initially registered under the name Tonkanese, a reference to the Gulf of Tonkin, though it carried no direct geographic connection to that region. The spelling was later changed to Tonkinese for consistency. The Canadian Cat Association granted championship status in 1971, and the Cat Fanciers' Association followed with full recognition in 1984 after years of provisional showing.