Kirstyn is of Scottish origin, derived from the name Christopher, which means "bearer of Christ." The name gained prominence during the Middle Ages and has since become popular in various English-speaking countries. Kirstyn is often spelled Kirstin or Kiristin, with variations including Kirstie and Kirra. It typically consists of two syllables, pronounced /KIRST-in/, though some may pronounce it /KEER-stin/. Kirstyn has been used as a feminine given name since the 19th century but became more common in the mid-20th century, peaking in popularity during the 1980s. It is often associated with other Scottish names like Kirsty and Kirsteen.
"The name Kirstyn experienced a significant rise in popularity from the late 1980s to the mid-1990s, with a peak of 132 births in 1990. However, it has steadily declined since then, reaching an all-time low of 7 births in 2017 and 8 births in 2016 and 2020."