Sopdet (𓇋𓁻𓋴𓇏𓏏) is the ancient Egyptian goddess of the star Sirius — the heliacal rising of Sirius announced the annual Nile flood (each July), and so Sopdet was honored as the bringer of fertility and the New Year.
Identified with Isis in later periods.
Sopdet reduces to four — the number of Egyptian Sirius.