Saint Gregory of Sinai, the Younger (Serbian: Григорије Синајски Млађи; late 13th- and early 14th-century) was the founder of Gregoriou Monastery at Mount Athos.
Although the exact date of his birth is unspecified, some hagiographers indicate that he was born between 1253 and 1258 in Serbia at a time when emigrant monks arrived in droves from the Middle East via Constantinople and Mount Athos after the Mongol hordes invaded Egypt and Syria.
The reason for the scarcity of information about him maybe because the oldest-known source about this time period was written a hundred years after his death.
That explains the very little hermaneia (an interpretation of what has been spoken more or less obscurely by others) about him but what is interesting that he did exist testified by Gregoriou Monastery that he bequeathed to the monastic state of Mount Athos.
It is known as a young man that he fell in love with learning and the Church being the bastion of knowledge that provided him with manuscripts and books.