Terriance is of American origin, derived from the Latin name Terrentius, which means 'firm' or 'strong'. It is a variant spelling of Terence, an ancient Roman family name that was popularized by the playwright Publius Terentius Afer. The name Terriance first gained prominence in the United States during the 20th century and has since become a unique and distinct given name for boys.
"Terriance peaked in popularity between 1968 and 1983, with a slight decline after its initial high of 7 births in 1979."