Tsubasa is from the Japanese 翼 (tsubasa — wings). Captain Tsubasa (キャプテン翼, since 1981) — one of the most-iconic and most-influential sports manga and anime series in Japanese history; created by Yoichi Takahashi; over 80 million copies sold worldwide; the iconic series has been credited as one of the influences on the global popularization of football (soccer) in Japan and has inspired generations of professional players including Lionel Messi, Andrés Iniesta, and Zinedine Zidane — all of whom have publicly cited Captain Tsubasa as a childhood influence. Tsubasa Yonaga — Japanese voice actor (anime).
Tsubasa 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 Tsubasa reduce to 2, The Peacemaker. This is a traditional interpretive system, not a factual claim about the name.