Shir (שִׁיר) is the Hebrew word for "song" or "poem" — used in the biblical Shir HaShirim (Song of Songs). A modern unisex Israeli name, popular for girls.
Shir is widely used in modern Israel.
Shir 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 Shir reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.