Bertha f
German and English: Latinized version of a Germanic name, a short form of various compound women's personal names containing the element berht famous (cognate with Modern English bright). It probably existed in England before the Conquest, and was certainly reinforced by Norman use, but fell from currency. It was reintroduced into the English-speaking world from Germany in the 19th century, but has once again fallen out of fashion.
Cognates: French: Berthe. Polish, Czech: Berta.
First names dictionary. 2012.