^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 Rome, the Saints Basilissa and Anastasia. Of noble family, they were disciples of the Apostles, and as they persevered courageously in the profession of their faith in the time of the emperor Nero, they had their tongues and feet cut off, were put to the sword, and thus obtained the crown of martyrdom."[9]
^"In Persia, in the reign of the emperor Decius, the holy martyrs Maxinius and OJympiades, who were beaten with rods and whips, and struck on their heads with clubs until they breathed their last."[9]
^"The same day, the holy martyrs Maro, Eutyches, and Victorinus, who, with blessed Flavia Domitilla, were banished to the island of Pontia (Ponza) for the confession of Christ. Being recalled in the reign of Nerva, and having converted many to the faith, they were put to death in different manners by the judge Valerian during the persecution of Trajan."[9]
^"Several Saints bear the name of Paternus. The one commemorated to-day was intimately connected with Great Britain, though a native of Brittany, and the son of a holy man called Petran, who had quitted his family and his country to embrace the religious state in Ireland. St. Padarn also forsook his home with the intention of joining his father; but, by the order of Providence, he landed in Wales, and there found an ample field for the exercise of his zeal in God's service. He established the great Abbey of Llanbadarn Vaur, which is said to have been the seat of his bishopric, and, according to the tradition, built other monasteries and churches. He was indefatigable in preaching the Faith, consoling the sick and afflicted, and ministering to the poor, while he was incessantly devoted to prayer and holy austerity of life. By such virtues he earned the title of one of the Blessed Visitors of Britain. According to the account received in Brittany, St. Padarn, after completing his work in Wales, returned to his native country, and there reposed in the Lord."[26]
^St Mstislav, Sovereign of Kyiv (1132). A son of St Volodymyr Monomach and his English wife, Gytha (daughter of King Harold of England), Mstislav received a second name in Baptism, that of his royal English grandfather, "Harold". In fact, the Norse sagas mention him only as "Harald".[18]
^"Miracle worker, born Bucovina, 1370-75, died Moldovita, c. 1455. Romanian Church. He was hegumenos of the monastery of Moldovita between 1445 and 1455, and organized the monks into three groups who took it in turns to pray, work and celebrate the liturgy. He had the gift of healing."[31]
^A monk of the monastery of Pereyaslavl, he rebuilt it after a Polish invasion and an epidemic of the plague which led to its abandonment.[33]
^ abcdeThe 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. p. 106.
^ abcdefghiApril 15. Latin Saints of the Orthodox Patriarchate of Rome.
^Rev. Sabine Baring-Gould (M.A.). "SS. Mutyches and Victorinus, MM. (end of first cent.)." In: The Lives of the Saints. Volume the Fourth: April. London: John C. Nimmo, 1897. p. 199.
^Great Synaxaristes: (in Greek)Ὁ Ἅγιος Πατέρνος. 15 Απριλίου. Μεγασ Συναξαριστησ.
^Rev. Sabine Baring-Gould (M.A.). "S. Padarn, B. of Vannes (about A.D. 560.)." In: The Lives of the Saints. Volume the Fourth: April. London: John C. Nimmo, 1897. pp. 200-202.
The Autonomous Orthodox Metropolia of Western Europe and the Americas. St. Hilarion Calendar of Saints for the year of our Lord 2004. St. Hilarion Press (Austin, TX). p. 29.
April 15. 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. p. 106.
(in Greek) Συναξαριστής. 15 Απριλίου. ecclesia.gr. (H Εκκλησια Τησ Ελλαδοσ).
Russian Sources
(in Russian)28 апреля (15 апреля). Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).