Igerna Brünhilda Johnson Sollas (1877–1965), also known as Hilda Sollas, was a British zoologist and geologist, and lecturer at Newnham College, Cambridge.
She had wide interests, studying marine organisms, genetics, and palaeontology.
She was a collaborator with Cambridge geneticist William Bateson.
An alumna of Alexandra College, Dublin, she was recognized as a role model for women in higher education in Ireland and England.