Keithians a party which separated from the Quakers in Pennsylvania in the year 1691. They were headed by the famous George Keith (q.v.), from whom they derived their name. Those who persisted in their separation, after their leader deserted them, practiced baptism, and received the Lord's Supper. This' party were also called Quaker Baptists, because they retained the language, dress, and manner of the Quakers.