Although released in Japan and some export markets as the Leone, in others (including at least the United Kingdom, Canada and United States), it was instead named with the trim level designation, which included: DL, GL, GLF, GL-10, and RX; sometimes the engine size would also form part of the name. This means the car is often referred to simply as the Subaru GL or the L-Series Subaru.
With information translatted from the Japanese Wikipedia article.
The first generation of the Leone was released October 7, 1971 as a front-wheel drive coupé, with trim levels DL, GL, and in Japan, the GS, and the GSR. April 1972 saw the introduction of the 2- and 4-door sedan with trim levels DL, GL and in Japan, the Super Touring. In September 1972, the four-wheel drive (4WD) station wagon was released, however it did not appear in the United States until 1974. Until then, four-wheel drive had been limited to mainly off-road vehicles for special use. Subaru broke that pattern by introducing a mass-produced four-wheel drive passenger car. Throughout the years, the Leone would see the introduction of a two-door hardtop, a four-door sedan, and a four-wheel drive station wagon.