who founded new netherland and pennsylvania and why
The Dutch founded New Netherlands to expand the reach of the Netherlands and William Penn founded Pennsylvania which was a payment for a debt the crown owed his family
Middle Colonies
King Charles II granted the land for the Pennsylvania Colony to William Penn on March 4, 1681 as payment for a debt the crown owed his family. 
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Middle Colonies [SEP] Province of Pennsylvania
King Charles II granted the land for the Pennsylvania Colony to William Penn on March 4, 1681 as payment for a debt the crown owed his family. Penn wrote the Frame of Government of Pennsylvania before departing for the colony, which called for religious tolerance towards many groups, including the Religious Society of Friends and local natives. As a proprietary colony, Penn governed Pennsylvania, yet its citizens were still subject to the English crown and laws. Penn's cousin William Markham served as the first colonial deputy governor. Demarcated by the 42nd parallel north and 39th parallel north, Pennsylvania was bordered by the Delaware River and the colonies of New York, Maryland, and New Jersey.