The name Rolyn has its origins in the Germanic languages, specifically the Old Norse and Old English tongues spoken by the Vikings and Anglo-Saxons in the early medieval period. It is derived from the root words "rod" (fame or counsel) and "lyn" (lake or pool), suggesting a meaning along the lines of "famous lake" or "renowned waters."

While the precise origin of the name is unclear, some historians believe it may have been inspired by the revered lakes and ponds found throughout Scandinavia and the British Isles. These bodies of water often held spiritual or cultural significance to the pagan tribes of the time, and a child born near such a site may have been bestowed with a name reflecting its importance.

The earliest known written record of the name Rolyn dates back to the 8th century, appearing in the Codex Sangallensis, a medieval manuscript containing glosses and notes on various texts. This suggests the name was in use among the Germanic peoples of Europe during the Early Middle Ages.

One of the first notable figures to bear the name Rolyn was Rolyn of Dorestad, a wealthy merchant and landowner who lived in the Frankish kingdom during the late 8th century. His name is mentioned in several contemporary chronicles, indicating the prominence of his trading activities along the Rhine River.

In the 11th century, a Rolyn of Lindisfarne was recorded as a monk and scribe at the famous Lindisfarne Priory in Northumbria, England. He is credited with producing several beautifully illuminated manuscripts, some of which are still preserved in various libraries and museums.

During the 12th century, a Norwegian nobleman named Rolyn Haraldsson was a prominent figure at the court of King Sverre Sigurdsson. He is mentioned in the Saga of Sverre, a medieval literary work detailing the life and exploits of the Norwegian king.

Another notable bearer of the name was Rolyn de Montfort, a French knight who fought alongside Simon de Montfort during the Albigensian Crusade in the early 13th century. His name appears in several contemporary chronicles of the conflict.

In the 15th century, a German artist and engraver named Rolyn Gemert gained recognition for his intricate woodcuts and engravings, many of which depicted religious scenes and allegorical figures. His works can be found in various art collections throughout Europe.