Fanny Mendelssohn (1805-47) was the famous Mendelssohn’s sister. She was married, had one child and composed over 450 pieces of music. Alas, she died young. Recently a lost piece of music by her was re-discovered, her Easter Sonata. Here is an article by her great-great-great-granddaughter, here is the sonata being played and here is more about it. Clemency Burton-Hill writes (in Year of Wonder for 2 February): ‘What’s so infuriating is that Fanny was in a supposedly supportive environment. Her brother was well aware of his sister’s genius. Yet even he prevented her from publishing her work.’