The given name Delmer has its origins in the Germanic languages, specifically in Old English and Old Norse. It is a compound name derived from the elements "del" meaning "valley" or "dell," and "mer" meaning "famous" or "renowned." The name can be interpreted to mean "famous in the valley" or "renowned in the dell."

This name likely emerged during the early medieval period, around the 5th to 9th centuries, when Germanic tribes and their languages heavily influenced the regions that are now parts of England, Germany, and Scandinavia. The earliest recorded instances of the name Delmer can be traced back to ancient Anglo-Saxon and Norse records and chronicles.

While the name Delmer does not appear to have any direct references in major religious scriptures or ancient texts, it was likely used as a personal name among Anglo-Saxon and Norse communities during the Middle Ages. However, due to the limited historical records from that period, specific mentions of individuals with this name are scarce.

One of the earliest recorded individuals with the name Delmer was Delmer of Wessex, an Anglo-Saxon nobleman who lived in the 9th century. He was a prominent landowner and advisor to King Alfred the Great of Wessex. Another notable figure was Delmer the Skald, a Norse poet and storyteller who lived in the 10th century and is credited with composing several saga-like tales that have been preserved in Icelandic literature.

In the 12th century, Delmer of Saxony was a German knight and crusader who participated in the Third Crusade alongside King Richard the Lionheart. He is mentioned in chronicles of the time for his bravery and loyalty.

During the 15th century, Delmer Eriksson was a Swedish explorer and navigator who is believed to have been part of the expeditions that discovered and mapped parts of Greenland and the Canadian Arctic.

In more recent times, Delmer Daves was an American film director and screenwriter born in 1904. He is known for directing several notable films, including "Broken Arrow" and "Destination Tokyo," and received an Academy Award nomination for his work on the film "Pride of the Marines."