Who were the Kolyvades

The Kollyvades (Greek: Κολλυβάδες) were the members of a movement within the Eastern Orthodox Church that began in the second half of the eighteenth century among the monastic community of Mount Athos, which was concerned with the restoration of traditional practices and opposition to unwarranted innovations, and which turned unexpectedly into a movement of spiritual regeneration.
Source: Wikipedia

"throughout the Turkish period the traditions of Hesychasm remained alive, particularly on Mount Athos. Here during the second half of the eighteenth century there arose an important movement of spiritual renewal, whose effects can still be felt today. Its members, known as the Kollyvades, were alarmed at the way in which all too many of their fellow Greeks were falling under the influence of the Western Enlightenment. The Kollyvades were convinced that a regeneration of the Greek nation would come, not through embracing the secular ideas fashionable in the west, but only through a return to the true roots of Orthodox Christianity – through a rediscovery of Patristic theology and Orthodox liturgical life. In particular, they advocated frequent communion – if possible, daily – although at this time most Orthodox communicated only three or four times a year. For this the Kollyvades were fiercely attacked on the Holy Mountain and elsewhere."

Timothy Ware. The Orthodox Church. 2nd ed. New York: Penguin Books, 1993. pp. 99–100