Veronica comes from the Late Latin vera icon, meaning "true image" — a reference to Saint Veronica, who according to Christian tradition wiped the face of Jesus on the way to Golgotha, and the cloth retained his image.
Veronica peaked at #58 in 1961. Today it sits in the U.S. top 400.
Veronica 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 Veronica reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.