The name Evalyn originated from the Old English language, emerging around the 5th century AD. It is a feminine form derived from the Old English name Ælfwine, which translates to "elf friend" or "elf companion." The prefix "Ælf" refers to the mythological creatures known as elves, while the suffix "wine" means friend or companion.

The earliest recorded instances of the name Evalyn can be traced back to the Anglo-Saxon period in England. It was particularly popular among the nobility and upper classes, who often drew inspiration from Old English names with connections to folklore and mythology.

One of the earliest known historical references to the name Evalyn comes from the Domesday Book, a medieval census commissioned by William the Conqueror in 1086. The name appears in several entries, indicating its usage among the Anglo-Saxon population of the time.

Throughout the Middle Ages, the name Evalyn saw sporadic use across various parts of England. Notable individuals who bore this name include Evalyn de Montfort, a 13th-century noblewoman and landowner (born c. 1225), and Evalyn Stafford, a 14th-century aristocrat and courtier (born c. 1350).

During the Renaissance period, the name Evalyn experienced a resurgence in popularity. One prominent figure with this name was Evalyn Calvert, an English settler and landowner in colonial Maryland, born in 1623. She played a significant role in the early development of the Maryland colony.

In the 18th century, Evalyn Granville (1708-1789) was a British author and playwright known for her plays and novels, which explored themes of female independence and social critique.

Another notable bearer of the name was Evalyn Walsh McLean (1886-1947), an American socialite and mining heiress famous for her extensive collection of jewels, including the Hope Diamond.

While the name Evalyn has maintained a relatively consistent presence throughout history, it has seen periods of increased popularity and occasional variations in spelling, such as Evaline or Evelyn.