Anouk is the Dutch and French diminutive of Anna — from the Hebrew Hannah (חַנָּה), meaning "grace." The name has been used in the Netherlands and France since the 19th century.
Anouk 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 Anouk reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.