Son of Trey; or third-born son
A modern American invention, Treyson likely originated as a patronymic surname-style name meaning 'son of Trey.' Since Trey is traditionally a nickname for a third-born child (from the French word for three), the name carries the connotation of being the third in a lineage.
Less common today
Treyson isn't in the latest US Top 1000. It last peaked at #1,421 in 2009.
US births per 5-year period, 1990βpresent (SSA data).
American college football running back