Zinnia is the genus name of the daisy-family flowering plant native to Mexico — named in honor of German botanist Johann Gottfried Zinn (1727-1759) who first scientifically described it. Mrs. Zinnia Naturals — the plant is the state wildflower of Indiana (since 1957). Saint Zinnia is not a canonical saint; the name belongs to modern botanical-naming tradition.
Zinnia 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 Zinnia reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.