Mary Capel appears in two images, both group portraits. She married twice; her first husband, Henry Seymour, was a Cavalier (royalist) who died in The Tower during the Commonwealth. She bore two children during that marriage. She then married Henry Somerset, becoming Duchess of Beaufort and bearing another seven children. She was an avid gardener and pioneering botanist. Her Wikipedia article is here.
Elizabeth Capel married Charles Dormer, becoming Countess of Carnarvon. She bore four children. Lady Elizabeth's article in thepeerage is here.