Son of the steward; gray-haired
A modern creative spelling of Grayson, which originated as an English surname meaning 'son of the reeve' or 'son of the steward'. It can also derive from the Middle English 'grey', referring to hair color or clothing. This specific spelling variation is part of a contemporary trend of replacing vowels with 'y'.
US births per 5-year period, 1990–present (SSA data).