The name Arleth is believed to have originated from the Old English language, deriving from the combination of the Germanic elements "ari" meaning "eagle" and "leoðu" meaning "song" or "poem." This suggests that the name may have been used to refer to someone with a poetic or melodious voice, likened to the majestic call of an eagle.

The earliest recorded instances of the name Arleth can be traced back to the Anglo-Saxon period in England, around the 7th to 11th centuries. During this time, names with similar spellings such as Arlede, Arlitha, and Arletha were also found in various historical records and charters.

One of the earliest known historical figures bearing the name Arleth was a Benedictine abbess who lived in the late 11th century. She served as the abbess of the Romsey Abbey in Hampshire, England, and was renowned for her piety and leadership.

Another notable figure named Arleth was a 12th-century cleric and scholar from Normandy, France. He served as the Archbishop of Rouen and was known for his contributions to the field of canon law.

In the 13th century, a woman named Arleth de Montfort was recorded as a member of the influential Montfort family in England. She was the sister of Simon de Montfort, a prominent figure in the Barons' War against King Henry III.

During the 15th century, an English noblewoman named Arleth Neville was mentioned in historical records. She was the daughter of Richard Neville, Earl of Warwick, and was married to Sir John Conyers, a prominent knight.

Lastly, in the 16th century, a woman named Arleth Harrington was recorded as a member of the gentry in Lancashire, England. She was the daughter of Sir James Harrington and was known for her charitable works and support of the local community.

Throughout its history, the name Arleth has remained relatively uncommon, but it has carried a distinctive and poetic quality, reflecting its linguistic roots and connection to the evocative imagery of an eagle's song.