(1):

(n.) One of the sect of Syrian Monophysites. The sect is named after Jacob Baradaeus, its leader in the sixth century.

(2):

(n.) A partisan or adherent of James the Second, after his abdication, or of his descendants, an opposer of the revolution in 1688 in favor of William and Mary.

(3):

(a.) Of or pertaining to the Jacobites.