The Blessed Wilbury is the saint which the Monastery in Kolyma is dedicated. Not much is known about personally; though the Roman Catholic Monastery is dedicated to him.
Behind the scenes[]
This may be a reference to the band, the Traveling Wilburys. Which consisted of George Harrison, Jeff Lynne, Roy Orbison, Tom Petty and Bob Dylan, : "George and Jeff had been calling studio equipment (limiters, equalizers) “wilburys.” So first, they named their fivesome The Trembling Wilburys. Jeff suggested “Traveling” instead. Everyone agreed."[1]
The name Wilbury does show up as a middle or surname in some examples, and in the name of landmarks.