found: National Library of Sweden in VIAF, August 21, 2013(Nyberg, Julia, 1785-1854; other names: Euphrosyne, 1785-1854; Nyberg, Julia Christina f. Svärdström, 1785-1854; Nyberg, Juliana Christina, 1785-1854; Svärdström, Julia Christina, 1785-1854) dbpedia link (Julia Kristina Nyberg (née Svärdström), November 17, 1784-April 16, 1854; Swedish romantic poet and lyricist; wrote the majority of her works under the pseudonym Euphrosyne; most famous for her Walpurgis Night holiday songs, including Vårvindar friska and Fruktmånglerskan med tapperhetsmedalj, many of which are still sung and recorded today)
