Juliana Fermor's article in thepeerage is here. Her article is above Thomas Penn's article. Thomas' father, William, founded the Province of Pennsylvania. According to William Penn's Wikipedia article, "Penn first called the area 'New Wales,' then 'Sylvania' (Latin for 'forests' or 'woods'), which King Charles II changed to 'Pennsylvania' in honor of the elder Penn." In 1682, William Penn established the provincial capital at Philadelphia, where this portrait is located. According to his Stanford University genealogical sketch, Thomas' Anglican marriage to Juliana marked his break with his father's Puritanism.