The name Cavin is believed to have originated from the Gaelic language, likely deriving from the Old Irish name Cadfan or Cadan. This name has its roots in the Celtic traditions of Ireland and Scotland, dating back to the early medieval period.

Some scholars suggest that the name Cavin is a Anglicized form of the Welsh name Cadwgan, which means "battle leader" or "battle chief." Others trace its origins to the Old Irish word "cad," meaning "battle" or "war," and the suffix "-an," indicating a diminutive or endearing form.

One of the earliest recorded instances of the name Cavin can be found in the 7th century, when St. Cadfan, a Welsh monk and missionary, established a monastery on the island of Bardsey off the coast of Gwynedd, Wales. His life and teachings were documented in the medieval Welsh hagiographies, contributing to the spread and popularity of the name.

In the 12th century, Cadfan ap Gruffydd, a Welsh prince and leader, played a significant role in the conflicts against the Norman invaders. His name and deeds were recorded in the Brut y Tywysogion, a medieval chronicle of Welsh princes.

Another notable figure bearing the name Cavin was Cavin Cambourne, an English merchant and explorer who accompanied Sir Walter Raleigh on his expedition to the Americas in the late 16th century. Cambourne's accounts of his travels and encounters with indigenous peoples were published in 1596.

In the 17th century, Cavin Douglas, a Scottish poet and cleric, gained recognition for his translation of Virgil's Aeneid into Middle Scots. His work, published in 1513, is considered a landmark in Scottish literature and a significant contribution to the preservation of the Scottish language.

In the 19th century, Cavin Calvé, a French operatic soprano, became renowned for her interpretations of the works of composers such as Wagner and Verdi. Born in 1858, she performed on the world's most prestigious stages and was celebrated for her powerful vocal range and dramatic presence.

While the name Cavin has experienced fluctuations in popularity over the centuries, it has maintained a presence in various cultures and regions, often reflecting the rich heritage and traditions of its Celtic origins.