Glory to Jesus Christ!
A wonderful icon indeed. I believe you mentioned this saint in another post - in our church, we commemorate a synaxarion of Belarusian saints, but for some reason, I do not believe St. Timofey is included among them. His role, however, seems quite important; perhaps he is overshadowed, in the national scale, compared to the more imposing figures of St. Euphrosyne or St. Cyril (this account's namesake!) in the following centuries? Still, his foundational role certainly seems understated.
Would you know if any troparia or prayers are associated with him?
turaŭski