Chayo Is A Gender-neutral Name Of Spanish Origin, Meaning "level Or Flat." It Is Often Used As A Charming Nickname For Names Ending In -rio, Such As Rosario, Which Means "rosary." It Is Popular Among Spanish-speaking Roman Catholics As It Comes From A Title Given To The Virgin Mary, "Our Lady Of The Rosary." Chayo Is Also A Surname That Is Most Popular In Mexico, Thailand, And Zambia.