Sunny is the English word used directly as a name — "of the sun," "bright and cheerful." It can also be a nickname for Sunshine.
Sunny has been quietly rising in the U.S. for decades. Today it sits in the U.S. top 800.
Sunny 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 Sunny reduce to 3, The Communicator. This is a traditional interpretive system, not a factual claim about the name.