The bright dog-star of later Greek naming; Egyptian Sothis-speech is another name for this light, not a second star. Not generic star, and not unpublished Sopdet the goddess.
Ptolemy’s Tetrabiblos treats Sirius among the fixed stars whose rising and nature enter judicial charts. Hellenistic handbook use of the dog-star, not generic star-astrology and not unpublished Sopdet.
Hunger and Pingree’s MUL.APIN attests the Arrow Star (MUL.KAK.SI.SÁ) among Mesopotamian star-names, identified with Sirius. Cuneiform list-work, not Ptolemy’s judicial dog-star and not generic star.