 The influence of Arabic metaphysics is much more extensive than these brief references to a few well-known thinkers suggest. The influence of Avicenna and Averroes, especially on the subject of metaphysics and on essence and existence, extends to many authors and over many centuries, up to sixteenth-century Jesuit authors such as Benedictus Pereira, Pedro da Fonseca and Francisco Suárez (Leinsle 1985, ch. 2)