William Penn (24 October [O.S. 14 October] 1644 – 10 August [O.S. 30 July] 1718) was an English writer, theologian, religious thinker, and influential Quaker who founded the Province of Pennsylvania. An advocate of democracy and religious freedom, Penn was known for his amicable relations and successful treaties with the Lenape native peoples who had resided in present-day Pennsylvania prior to European colonisation there.
In 1681, King Charles II granted an area of land corresponding to the present-day U.S. states of Pennsylvania and Delaware to Penn to offset debts he owed Penn's father, the admiral and politician Sir William Penn. The following year, Penn left England and sailed up Delaware Bay and the Delaware River, where he founded Philadelphia on the river's western bank. Penn's Quaker government was not viewed favorably by the Dutch, Swedish and English settlers in what is now Delaware, and the land was also claimed by the Calverts, proprietors of the neighbouring Province of Maryland.