Coeffeteau, Guillaume a French theologian, was born at St. Calais, Sarthe, in 1589. Having completed his theological studies and been ordained priest, he became rector of Bagnolet, near Paris. He declined to be coadjutor of the bishop of Marseilles, his brother, and contented himself with a pension of two thousand livres. In 1623 he resigned at Bagnolet, in order to retire to the college of Bayeux, where he composed the greater part of his works. He died at Paris at the Dominican house, Rue Sainte-Honore, in 1660, leaving an edition of the poem of Simon Nanquier, with notes: De Lubrico Temporis Curriculo (Paris, 1616): — Compendiosa Formandae Orationis Concionisque Ratio (ibid. 1643). His posthumous works were published by his nephew, James Hallier, under the title, Florilegium, etc. (ibid. 1667). See Hoefer, Nouv. Biog. Generale, s.v.