The name Greyson is of English origin and means "Son Of The Grey-haired Man." The origin is the culture in which the name originated, or in the case of a word--the language in which it most appears.
Greyson is originally an English surname that has become a popular first (given) name. Alternate spellings of the name Greyson include Grayson and Gracen. The most common nickname for the name Greyson is Gray.