Spanish theologian, born in Almazán, Soria, in 1512, and died in Rome in 1565. Fellow of San Ignacio of Loyola and second general of the Compañía de Jesús. Doctor of theology by the University of Paris, taught scholastic theology in the Roman College of the Sapientia commissioned by Paul III. The clarity of ideas made Lainez a personage of first rank at the Grand Council. His writings have been compiled in part by P. Grisar in two editions: Disputationes tridentinae and Disputationes variae ad Concilium Tridentinun spectantes, Oeniponte (1886).