Whatever happened to Moshe Dayan's forgotten first wife, Wilhelmina Wagner?

Following the deaths of Ruth Dayan and Rachel Dayan, a 1935 marriage license was found that proves the defense minister had been married to a third woman https://www.haaretz.com/israel-news/.premium-whatever-happened-to-moshe-dayan-s-forgotten-first-wife-wilhelmina-wagner-1.9671082