Son of the gray-haired one
A modern creative spelling of Grayson, which originated as an English surname meaning 'son of the reeve' or 'son of the gray-haired man'. The use of 'y' in place of 'o' is a contemporary American trend to make traditional names feel more unique.
Less common today
Graesyn isn't in the latest US Top 1000. It last peaked at #3,731 in 2020.
US births per 5-year period, 1990βpresent (SSA data).