Berth is a name of German origin, derived from the Germanic element "berht" which means "bright" or "famous". It is also associated with the Gothic name Bertharius, which was borne by several saints in the Middle Ages. The name Berth was popular among the Franks during the Early Middle Ages and was later adopted by other European cultures. It has been used as a given name for boys throughout history, but it is not particularly common today. Some notable figures with the name Berth include the 9th-century Frankish nobleman Berthold I of Bavaria and the 10th-century German bishop Berthold of Regensburg.
Bertha was quite popular in 1918 with six newborns bearing the name that year.