Sequoia is the genus of giant redwood trees — named after Sequoyah (c. 1770-1843), the Cherokee polymath who created the Cherokee syllabary. The Sequoia National Park preserves the world's largest trees.
Sequoia is widely used in modern naming.
Sequoia 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 Sequoia reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.