Sir Simon Fleming (1330) a knight, became the 7th Baron of Slane, and the 7th Lord of Parliament of this family. Being a minor on the death of his father, he obtained his properties in 1347. He sat in Parliament in the reign of Edward III. He married Cecelia Champeron of Modbury, daughter of Thomas Champeron. He died in october 1370, and was succeeded by his eldest son. During his life, two-thirds of the population of Drogheda died of the black death plague, 1348-49.