Sidonie Josepha Grünwald-Zerkowitz (17 February 1852 – 12 June 1907) was an Austro-Hungarian writer, poet, translator, educator, and fashion designer.

[7] Zerkowitz wrote lyrical poems, essays and pedagogical articles in Hungarian for the daily and belletristic papers in Budapest, becoming well known in literary circles.

Her pedagogical articles, which attracted the attention of Minister of Education Ágoston Trefort, advocated for reforms of the higher state institutions for girls in Hungary.

[8] In order to earn a living, she gave up her plan to become an actress, left her newborn child in the care of her parents and took a job as a teacher in the village of Winau.

In 1877, after securing a divorce, she re-converted to Judaism and married the wealthy Vienna merchant and widower Leopold Grünwald, with whom she bore five more children.

She lectured extensively on women's fashion in Vienna and Constantinople,[5] and, after her husband's death in 1890, she took over the management of a Viennese language school.

[13] Das Gretchen von Heute, a volume of erotic poetry, was subject to an obscenity trial soon after its release, and subsequently banned across the Austrian Empire.