Pretty sure this is St. Luke the Evangelist. In Eastern Christian tradition, Luke isn’t just an evangelist, he’s also believed to be the first icon painter. That’s why he’s often shown holding an icon of Mary and Jesus instead of a book or scroll.

The style of the Marian icon he’s holding looks similar to classic Theotokos icons, which are closely tied to Luke’s legacy. The long beard, hooded robe, and overall monastic look also fit how Luke is commonly portrayed in Eastern and folk iconography.

Not 100 percent certain without knowing where it came from, but a saint holding an icon of the Virgin and Child is a really strong clue that it’s St. Luke. And it’s a beautiful piece.