A male given name from the Germanic languages, the usual U.S. spelling of Geoffrey. Popular in the latter half of the 20th century. / A surname originating as a patronymic derived from Geoffrey.

A surname.

(probability) In Bayesian probability, a non-informative (objective) prior distribution for a parameter space; it is proportional to the square root of the determinant of the Fisher information matrix.

plural of Jeffreys prior

(mineralogy) An orthorhombic-disphenoidal colorless mineral containing aluminum, beryllium, calcium, hydrogen, oxygen, silicon, and sodium.