Sieglinde is a name of German origin, derived from the Old High German words 'sigu' meaning victory and 'lind' meaning gentle or soft. This name was popularized through Richard Wagner's opera "Die Walküre," the second opera in his cycle "Der Ring des Nibelungen." In the opera, Sieglinde is a twin sister of Siegrune and wife of Siegmund. She is also the mother of Siegfried, the hero of the cycle. The name has since become associated with this mythological figure and German culture.
"Sieglinde was quite popular as a baby girl's name in the late 1960s and early 1970s, with five girls being named Sieglinde each year from 1969 to 1974, before seeing a slight increase to six births in 1980. Overall, there were sixteen baby girls named Sieglinde during this period."