Buddhist Dictionary of Pali Proper Names by G P Malalasekera
Visuddhācariya Thera
Visuddhācariya Thera:A monk sent by Dhammika,ruler of Ayojjhā,to Ceylon,at the head of a group of monks,and at the request of Kittisirirājasīha,to reinstate the Order in that Island.
He remained in Ceylon,admitting many monks into the Order,to whom he taught the doctrine.Cv.c.131,171f.