A Dictionary of All Religions and Religious Denominations/Keithians
KEITHIANS, a party that separated from the quakers, in Pennsylvania, in the year 1691. They were headed by the famous George Keith, from whom they derived their name. Those who persisted in their separation, after their leader deserted them and returned to England, practised baptism, received the Lord's supper, and kept the seventh day sabbath, whence they were called Quaker-Baptists, and Sabbatarians: but they retained the language, dress, and manners of the Quakers.
- Edward's Hist. of American Baptists, p. 55-60