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 does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Sopdet reduce to 7, The Seeker. This is a traditional interpretive system, not a factual claim about the name.