Berthal is of Germanic origin, derived from the elements 'berht' meaning bright or famous, and 'hal' which signifies army or people. This name was likely borne by various individuals in medieval Germany, but it has since fallen out of common usage. It is not widely known today outside of historical contexts.
"The name Berthal had some popularity in the early to mid-20th century, with a peak of seven births in 1925, and a total of seventeen recorded births between 1919 and 1934."