Deleta is of Latin origin and means "delivered" or "having given birth". It was popularized by the ancient Roman family gens Delata, who were known for their courage and honor. In the Middle Ages, it became a patronymic surname, but over time, it has evolved into a given name as well.
The name Deleta appears to have had modest popularity throughout the mid-20th century, with peaks in the years 1939 and 1957, each having more than expected births for that decade.