Hertha Marks Ayrton
Phoebe Sarah Hertha Ayrton , was a British engineer, mathematician, physicist, and inventor. Known in adult life as Hertha Ayrton, born Phoebe Sarah Marks, she was awarded the Hughes Medal by the Royal Society for her work on electric arcs and ripples in sand and water.
Hertha Ayrton was born Phoebe Sarah Marks in Portsea, Hampshire, England, onApril 1854. She was the third child of a Polish Jewish watchmaker named Levi Marks, an immigrant from Tsarist Poland and Alice Theresa Moss, a seamstress, the daughter of Joseph Moss, a glass merchant of Portsea. Her father died in 1861, leaving Sarahs mother with seven children and an eighth expected. Sarah then took up some of the responsibility for caring for the younger children.
Source: Wikipedia