Elizabeth Pepys (Elisabeth St Michel) (1640-1669) was the wife of Samuel Pepys whom she married in 1655, shortly before her fifteenth birthday. Her father, Alexandre de St. Michel, was born a FrenchCatholic, but converted to the Protestant faith. He married Dorothea, the daughter of Sir Francis Kingsmill, in Ireland. Most of what is known about Elizabeth comes from her husband's diary. She died of typhoid fever in 1669.
When Samuel Pepys was formulating what became the transformational theory of life in 1661, he shared some of his early ideas with Elizabeth Pepys. Elizabeth stated that "Holy Writ sufficed", which disappointed her husband.