One of those theories advocated that Helena was of Angevine origin. That theory was based on free interpretation of some sources from the 1280s and 1290s, showing that Angevine kings of Naples referred to Queen Helen of Serbia as "dear cousin". Based on that, some researchers started to advocate Helena′s direct origin from the House of Anjou, coining the term ""Helen of Anjou"" (Jelena Anžujska). In spite of not being supported by sources, the term became more popular during the 1920s and 1930s. It was promoted not only by journalists and publicists, but also by some scholars.