The Monk Antonii (Anthony) of Leokhnovsk, Novgorod, was from the Tver lineage of the Veniaminov boyar-nobles. The monk lived as an hermit not far from Novgorod, in the Rublev wilderness, at the River Perekhoda. In about the year 1556 he resettled with the wilderness-dweller Tarasii, who lived beyond Lake Il'men at Leokhnovo, not far from Stara Rus', and from him received monastic tonsure. Thus began the wilderness monastery in honour of the Transfiguration of the Lord, afterwards called the Leokhnovsk or Ivetsk-Antoniev monastery. The Monk Antonii lived into old age, having acquired the gift of perspicacity.
In the year 1611, when the Swedes had laid waste the surroundings of Novgorod, the monk on the invitation of metropolitan Isidor resettled to Novgorod. He died on 14 September 1611 at age 85 and was buried nearby the church of the holy Evangelist Luke, on the side towards the Saint Sophia church. Before his death and in the presence of many the monk said, that his body would rest in his wilderness-monastery. A disciple of the monk, named Gregory, having returned to the place of the monastery laid waste and burnt by the Swedes, made a cell there with a chapel and remained there to live. The Monk Antonii thrice appeared to him in a dream and said: "Brother Grigorii, go to Novgorod, tell metropolitan Kiprian and the elders of the city, that they should put me in the place of my monastery". After the report of Gregory, the metropolitan made a church procession to the grave of the Monk Antonii. The uncovered incorrupt relics were transferred to the Leokhnovsk monastery on 13 July 1620. At the uncovering of the relics, a blind man named Iosif gained his sight, and many other miracles occurred.
There is an especial order of commemorations, celebrated by the churches in the name of the Monk Antonii of Leokhnovsk, both in the village of Leokhnovo (not far from Stara Rus") and in the Rublevsk wilderness-monastery. On the Second Friday after the feast of the First-Ranked Apostles Peter and Paul (29 June) is remembered the Uncovering and Transfer of the Relics of the Relics of the Monk Antonii from Novgorod to the Leokhnovsk monastery. On the Ascension of the Lord is remembered the coming of the Monk Antonii from the Rublev wilderness to Leokhnovo. On 17 October – is the memory of the Repose of the Saint, who died on the feast of the Exaltation of the Venerable Cross, on the 9th hour of the evening. At the Rublevsk wilderness monastery was celebrated likewise the memory of the Consecration of the church in the name of the Monk Antonii – on 30 August (1873).