Sitre means daughter of Ra, from sat (daughter) and the sun god Ra. It was borne by a queen at the dawn of the Nineteenth Dynasty.
A luminous royal name, it makes its bearer a child of the sun.
Sitre 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.
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In Pythagorean numerology the letters of Sitre reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.