Helena Ottawowa (* February 6, 1874 Lviv – † August 15. 1948 Krakow) pianist and composer.
Information about the composer is available on the wikipedia website
Memories about the artist here
The image of Helena Ottawowa was used by the painter Jan Henryk Rosen to depict St. Margaret in the painting Homage to the Bethlehem Shepherds, painted in the Armenian Cathedral in Lviv.