King William III (William of Orange ) was Dutch and married to James II protestant daughter Mary.
After James II's son was born to his Catholic wife and it was obvious the child would be raised Catholic, English Lords sent for William of Orange to deliver England from the tyranny of James II.
King William's landing William III was seen as the deliverer. Because William III was not an Englishman and had not come to the throne through inheritance his loyalty to the English would always be questionable.
William and Mary accepted their crowns at Whitehall February 1689. William and Mary reigned jointly - recognized as joint monarchs but forced to accept parliamentary limitations on their sovereignty
William insisted on equal status with Mary based on military conquest and his own blood claim as Charles I grandson
William had a cold manner about his personality was considered by some as contemptuous. The English could not fully trust him nor could William fully trust the English who had threw one King out in favor of a foreigner. However, the people felt he had delivered them from the evil tyranny of Catholics.
William did not want his subjects as slaves he felt they should have some degree of freedom.
Mary died first, then William. They were preceded by Queen Anne.
Significant Events of William and Mary's Reign