Treysean is of American origin, derived from the combination of "Tre," short for Trevor, and "Sean." It means "ardent defender" or "wise." This name gained popularity in the late 20th century and has since been used as a unique, contemporary option for boys.
"Treysean saw its peak popularity with 15 births in 2010, while the most recent years show a steady decrease to 6 births in 2014."