Elizabeth Warleggan (formerly Poldark, née Chynoweth) was the Mistress of Trenwith and the wife of Francis Poldark with whom she had one child, Geoffrey Charles Poldark. She was widowed and later became the wife of George Warleggan.
At some point, she met and became engaged to Ross Poldark. In 1780, Ross was arrested for brawling and joined the British Army. By 1783, he was presumed to have died. She fell in love with Francis Poldark and they became engaged.
A couple of weeks before her wedding to Francis, she attended a meal in Trenwith. She was shocked when Ross Poldark returned home and felt awkward when they had to tell him about their engagement.