  The theories of universal hylomorphism and plurality of forms are found together in many authors from the twelfth and thirteenth century.  They are both held, for instance, by the author known to the scholastics as “Avicebron” (or Avicebrol, Avencebrol, etc.), who is to be identified with the Spanish Jewish philosopher and poet Solomon Ibn Gabirol (c. 1022–c. 1052/c. 1070), and whose Mekor Hayyim (= Fons vitae, “Fountain of Life”) was translated into Latin in the late-twelfth  century.[9]  Indeed, medieval as well as modern scholars have sometimes looked to Ibn Gabirol as the main source for the two doctrines in the thirteenth  century.[10]  Other authors who held both theories included the translator of the Fons vitae, one Dominic Gundisalvi   (Gundissalinus)[11]  as well as people as diverse as Thomas of   York,[12]  St.   Bonaventure,[13]  the anonymous thirteenth-century Summa philosophiae once ascribed to Robert  Grosseteste,[14]  John Pecham, Richard of  Mediavilla,[15]  and many  others.[16]