Son of the steward or son of the gray-haired one
A modern creative spelling of the English surname Grayson. It traditionally refers to the son of a 'reeve' (a medieval local official or steward) or simply the son of a man with gray hair.
Less common today
Graysyn isn't in the latest US Top 1000. It last peaked at #5,516 in 2017.
US births per 5-year period, 1990βpresent (SSA data).