Benjamin Franklin
William Franklin

In 1730, 24-year-old Franklin publicly acknowledged his illegitimate son William and raised him in his household. William was born on February 22, 1730, but his mother's identity is unknown. He was educated in Philadelphia and beginning at about age 30 studied law in London in the early 1760s. William himself fathered an illegitimate son, William Temple Franklin, born on the same day and month: February 22, 1760. The boy's mother was never identified, and he was placed in foster care. In 1762, the elder William Franklin married Elizabeth Downes, daughter of a planter from Barbados, in London. In 1763, he was appointed as the last royal governor of New Jersey.

A Loyalist to the king, William Franklin saw his relations with father Benjamin eventually break down over their differences about the American Revolutionary War, as Benjamin Franklin could never accept William's position. Deposed in 1776 by the revolutionary government of New Jersey, William was placed under house arrest at his home in Perth Amboy for six months. After the Declaration of Independence, he was formally taken into custody by order of the Provincial Congress of New Jersey, an entity which he refused to recognize, regarding it as an "illegal assembly." He was incarcerated in Connecticut for two years, in Wallingford and Middletown, and, after being caught surreptitiously engaging Americans into supporting the Loyalist cause, was held in solitary confinement at Litchfield for eight months. When finally released in a prisoner exchange in 1778, he moved to New York City, which was occupied by the British at the time.

While in New York City, he became leader of the Board of Associated Loyalists, a quasi-military organization chartered by King George III and headquartered in New York City. They initiated guerrilla forays into New Jersey, southern Connecticut, and New York counties north of the city. When British troops evacuated from New York, William Franklin left with them and sailed to England. He settled in London, never to return to North America. In the preliminary peace talks in 1782 with Britain, "... Benjamin Franklin insisted that loyalists who had borne arms against the United States would be excluded from this plea (that they be given a general pardon). He was undoubtedly thinking of William Franklin."
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