The name Evan is of Welsh origin, derived from the word "Iefan," which itself is a variation of the Hebrew name "John," meaning "God is gracious" or "Yahweh is merciful." It emerged as a distinct name during the Middle Ages in Wales.

Evan was initially used as a Welsh form of the name John, but over time it developed its own distinct identity. The earliest recorded use of the name Evan dates back to the 13th century in Welsh literature and historical records.

One of the earliest known figures with the name Evan was Evan Sais, a Welsh poet and clergyman who lived in the late 13th century. He is best known for his satirical poems and his involvement in theological disputes.

In the 15th century, Evan Vaughan was a prominent Welsh soldier and landowner who fought in the Wars of the Roses. He played a significant role in the Battle of Mortimer's Cross in 1461.

During the 16th century, Evan Gwyn, also known as Evan Gough, was a renowned Welsh musician and composer who is credited with writing some of the earliest known Welsh harp music.

In the 17th century, Evan Gwynne was a Welsh historian and antiquarian who wrote extensively about the history and culture of Wales. His works, such as "The History of the Gwydir Family," are considered important sources of information about Welsh genealogy and traditions.

Another notable figure with the name Evan was Evan Evans, a Welsh clergyman and scholar who lived in the 18th century. He was known for his translations of Welsh literary works into English and his efforts to promote Welsh culture and language.

These examples illustrate the long-standing association of the name Evan with Welsh culture and its rich literary and historical heritage. While the name has since gained popularity in other parts of the world, its origins can be traced back to the ancient Welsh language and the traditions of Wales.