The given name Kevyn is a variant spelling of the more common name Kevin, which has its origins in the ancient Celtic language. It is derived from the Gaulish name Cevynnu, which translates to "born of the noble ones" or "handsome one." The name likely emerged in the regions of modern-day France, Ireland, and Britain during the 5th to 6th centuries.

One of the earliest recorded instances of the name Kevin can be found in the 6th century, when St. Kevin, an Irish monk and hermit, lived. He is known for founding the famous Glendalough monastery in County Wicklow, Ireland, and is celebrated as the patron saint of the Dioceses of Dunkeld and Arundel.

The name Kevyn gained popularity in medieval times, particularly in Ireland and Scotland. Notable figures from this era include Kevyn Óg Ó Dálaigh, a renowned Irish poet who lived in the 13th century, and Kevyn Carruthers, a Scottish nobleman and landowner from the 15th century.

During the Renaissance period, the name was more widely adopted across Europe. One prominent figure was Kevyn Pöhler, a German artist and engraver born in 1486, known for his intricate woodcut illustrations.

In the 18th century, the name Kevyn gained traction in England and Wales. One notable bearer was Kevyn Rudd, a British naval officer and explorer who accompanied Captain James Cook on his voyages to the Pacific Ocean in the late 1700s.

The 19th century saw the name Kevyn gain popularity in North America. One significant figure was Kevyn O'Higgins, an Irish-American journalist and author who served as the Assistant Secretary of the United States Treasury from 1865 to 1869.

While the spelling "Kevyn" is less common than "Kevin," it has been used throughout history, often as a variant or anglicized form of the original Celtic name. The name has a rich heritage, spanning across various cultures and time periods, and continues to be a popular choice for parents seeking a name with strong historical roots.