拉特兰努（Ratramnus，卒于868年），是9世纪的法兰西修士和神学家，他曾应西法兰克国王查理二世的要求， 撰写了《论主的身体及血》(De Corpore et Sanguine Domini)、《论得救预定》(De praedestinatione)两书。
他将圣餐中的酒与饼称之为“象征”，他在上述的第一部书中指出，圣餐礼的饼与酒经圣职人员祝圣后虽外状没有改变，但已成为纪念基督肉体和血的神秘象征，
其中含有只能为信者感受，并只能在信者身上发挥效用的能力。不过他的著作在1050年受到谴责，韦尔切利会议(Council of Vercelli)下令销毁此书。此书流传甚广，1559年被天主教会列为禁书，1900年解禁。而他的另一本书，《论得救预定》指出，人犯罪并非上帝预定，但人得救则是上帝预定。它支持圣奥古斯丁，驳斥理姆斯大主教辛克马尔(Hincmar)。拉特兰努反对拉得伯土（Paschasius Radbertus）的圣餐观把实在论推进一大步走向化质说，认为圣餐中的血和肉与十字架上的并不相同，因此圣餐只有象征的意义。他坚决反对圣餐中基督的身体就等于马利亚所生的身体．他认为可以引用奥古斯丁（Augustine）和安波罗修（Ambrose）的作品来反对拉得伯土的看法。 拉特兰努的作品很受改教派人士欢迎，他的言论也对某些人产生直接的影响。

Ratramnus, (died c. 870) a Frankish monk of the monastery of Corbie, near Amiens in northern France, was a Carolingian theologian known best for his writings on the Eucharist and predestination. His Eucharistic treatise, De corpore et sanguine Domini (On the Body and Blood of the Lord), was a counterpoint to his abbot Paschasius Radbertus’s realist Eucharistic theology. Ratramnus was also known for his defense of the monk Gottschalk, whose theology of double predestination was the center of much controversy in 9th-century France and Germany. In his own time, Ratramnus was perhaps best known for his Against the Objections of the Greeks who Slandered the Roman Church, a response to the Photian schism and defense of the filioque addition to the Niceno-Constantinopolitan Creed.