"Form of Seven"
The name Sevyn is commonly a unisex name from the "American" origin.
Sevyn is a phonetic respelling of Seven, the English word for the number 7. The substitution of y for the second e is a common pattern in American respellings of existing names, and the two spellings are pronounced the same way. Seven has been used as a given name in United States birth records, and Sevyn first appears in those records in 1999.
Seven means "The Number 7".
The pronunciation of Sevyn is SEV-in.