Wynter is the modern American spelling of Winter — from the Old English winter. Undercover (2015-2018). Winter Park — multiple US locations. The four-seasons naming family (Summer, Autumn, Winter, Spring) has become one of the most-recognizable American naming clusters of the 21st century.
Wynter 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 Wynter reduce to 6, The Nurturer. This is a traditional interpretive system, not a factual claim about the name.