Saints Quintus, Quintilla, Quartilla, Mark and Companions, martyrs venerated in Sorrento near Naples in Italy.[12][13]
Saints Apollonius and Leontius (Leontinus), by tradition early Bishops of Braga in Portugal (4th century)[12][13]
Saint Auxilius, a companion of St Patrick, became Bishop of Killossey (near Naas, County Kildare) in Ireland (c. 460)[12][14]
Saint John the Syrian of Pinna, a Syrian monk who settled in Pinna near Spoleto in Italy, became abbot of a large monastic colony there for forty-four years (6th century).[12][15][note 2]
Saints Landoald and Amantius, a priest and deacon who helped enlighten what is now Belgium and north-eastern France, founded the church at Wintershoven (c. 668)[12][16][note 3]
Saint Adrian, disciple of St Landoald, murdered while begging alms for his monastery near Maastricht in the Netherlands (c. 668)[12]
Saint Lactan, born near Cork in Ireland, St Comgall entrusted him to found a monastery at Achadh-Ur, now Freshford, in Kilkenny (672)[12][17]
The notation Old Style or (OS) is sometimes used to indicate a date in the Julian Calendar (which is used by churches on the "Old Calendar"). The notation New Style or (NS), indicates a date in the Revised Julian calendar (which is used by churches on the "New Calendar").
"At Civita-di-Penna, the birthday of blessed John, a man of great holiness, who came from Syria into Italy, where he constructed a monastery, and, after having been the spiritual guide of many servants of God for forty-four years, rested in peace, renowned for great virtue.[13]
"At Ghent the Saints Landoaldus, a Roman priest, and the deacon Amantius, who were sent to preach the Gospel by pope St. Martin, and after their death became illustrious by many miracles."[13]
A prince of Northumbria in England, after many years of exile among the Picts of Scotland, he was martyred in Shropshire. "The many miracles which followed his martyrdom are a testimony to the holiness of his life. He was buried at Lilieshall, in Shropshire, and afterwards translated to Derby, where a church was erected under his invocation. Thither pilgrims, especially from the North of England, were accustomed to resort, out of veneration for his sacred relics."[19]
The Roman Martyrology. Transl. by the Archbishop of Baltimore. Last Edition, According to the Copy Printed at Rome in 1914. Revised Edition, with the Imprimatur of His Eminence Cardinal Gibbons. Baltimore: John Murphy Company, 1916. pp.80-81.
Rev. Sabine Baring-Gould (M.A.). "S. JOHN, AB. AT CIVITA-DI-PENNE. (4TH CENT.)." In: The Lives of the Saints. Volume the Third: March. London: John C. Nimmo, 1897. pp.329-331.
Rev. Sabine Baring-Gould (M.A.). "SS. LANDOALD, P., AMANTIUS, D., AND ADRIAN, M. (A.D. 743.)." In: The Lives of the Saints. Volume the Third: March. London: John C. Nimmo, 1897. pp.333-334.
The Autonomous Orthodox Metropolia of Western Europe and the Americas (ROCOR). St. Hilarion Calendar of Saints for the year of our Lord 2004. St. Hilarion Press (Austin, TX). pp.22-23.
March 19. Latin Saints of the Orthodox Patriarchate of Rome.
The Roman Martyrology. Transl. by the Archbishop of Baltimore. Last Edition, According to the Copy Printed at Rome in 1914. Revised Edition, with the Imprimatur of His Eminence Cardinal Gibbons. Baltimore: John Murphy Company, 1916. pp.80-81.
(in Greek) Συναξαριστής. 19 Μαρτίου. ECCLESIA.GR. (H ΕΚΚΛΗΣΙΑ ΤΗΣ ΕΛΛΑΔΟΣ).
Russian Sources
(in Russian)1 апреля (19 марта). Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).