Jefferson County was formed from Berkeley County in 1801 because the citizens of southeastern Berkeley county felt they had to travel too far to the county seat of Martinsburg. Charles Washington, the founder of Charles Town and brother to George Washington petitioned for a new county to be formed. It was named for Thomas Jefferson, author of the Declaration of Independence and third President of the United States.
The skeleton of a giant is said to have been dug up near Shannondale Springs.(Jefferson County) West Virginia
History of Hampshire County, West Virginia 1897