April 9 (Eastern Orthodox liturgics) (English Wikipedia)

Rev. Sabine Baring-Gould (M.A.). "S. Eupsychius, M. (A.D. 362.)." In: The Lives of the Saints. Volume the Fourth: April. London: John C. Nimmo, 1897. pp. 130-131.
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. 100.
Very Rev. John O'Hanlon. "Article VI.—Festival of Seven Holy Virgins, Martyrs." In: Lives of the Irish Saints: With Special Festivals, and the Commemorations of Holy Persons. Vol. IV. Dublin, 1875. p. 88.
Very Rev. John O'Hanlon. "Article VIII.—Reputed Feast of St. Dotto, Abbot, Orkney Islands." In: Lives of the Irish Saints: With Special Festivals, and the Commemorations of Holy Persons. Vol. IV. Dublin, 1875. pp. 88-89.
Very Rev. John O'Hanlon. "Article I.—St. Waldetrude, Waltrude, or Vautrude, Patroness of Mons, and of Haynault, Belgium. [Seventh Century.]." In: Lives of the Irish Saints: With Special Festivals, and the Commemorations of Holy Persons. Vol. IV. Dublin, 1875. pp. 84-86.
Rev. Sabine Baring-Gould (M.A.). "S. Waltrudis, Abss. (end of 7th Cent)." In: The Lives of the Saints. Volume the Fourth: April. London: John C. Nimmo, 1897. p. 131.
Rev. Richard Stanton. A Menology of England and Wales, or, Brief Memorials of the Ancient British and English Saints Arranged According to the Calendar, Together with the Martyrs of the 16th and 17th Centuries. London: Burns & Oates, 1892. pp. 150-151.

ecclesia.gr

(in Greek) Συναξαριστής. 9 Απριλίου. ecclesia.gr. (H Εκκλησια Τησ Ελλαδοσ).

holytrinityorthodox.com

April 22 / April 9. Holy Trinity Russian Orthodox Church (A parish of the Patriarchate of Moscow).

mospat.ru

(in Russian) 9 апреля (ст.ст.) 22 апреля 2013 (нов. ст.) Archived 2014-02-22 at the Wayback Machine. Русская Православная Церковь Отдел внешних церковных связей.

oca.org

Martyr Eupsychius of Caesarea, in Cappadocia. OCA - Lives of the Saints.
Martyr Desan the Bishop and 272 others in Persia. OCA - Lives of the Saints.
Monkmartyr Bademus (Vadim) of Persia. OCA - Lives of the Saints.
New Martyr Raphael of Lesbos. OCA - Lives of the Saints.
St Eleni (who was also called Susanna), New martyr of Lesbos. OCA - Lives of the Saints.

orthochristian.com

April 9 / April 22. Orthodox Calendar (pravoslavie.ru).

orthodoxengland.org.uk

April 9. Latin Saints of the Orthodox Patriarchate of Rome.

synaxarion.gr

Great Synaxaristes: (in Greek) Ὁ Ἅγιος Εὐψύχιος ὁ ἐν Καισαρείᾳ. 9 Απριλίου. Μεγασ Συναξαριστησ.
Great Synaxaristes: (in Greek) Ὁ Ἅγιος Αὐδιησοῦς ὁ Μάρτυρας καὶ οἱ σὺν αὐτῷ τριακόσιοι Μάρτυρες ἐν Περσίδι. 9 Απριλίου. Μεγασ Συναξαριστησ.
Great Synaxaristes: (in Greek) Ὁ Ἅγιος Βάδιμος ὁ Ὁσιομάρτυρας. 9 Απριλίου. Μεγασ Συναξαριστησ.
Great Synaxaristes: (in Greek) Ὁ Ὅσιος Ἀκάτιος Ἐπίσκοπος Ἀμίδης Μεσοποταμίας. 9 Απριλίου. Μεγασ Συναξαριστησ.
Great Synaxaristes: (in Greek) Οἱ Ἅγιοι Ραφαὴλ, Νικόλαος καὶ Εἰρήνη οἱ Μάρτυρες. 9 Απριλίου. Μεγασ Συναξαριστησ.
Great Synaxaristes: (in Greek) Μετακομιδὴ Τιμίων Λειψάνων Ἁγίας Μόνικας εἰς Ρώμη. 9 Απριλίου. Μεγασ Συναξαριστησ.

web.archive.org

(in Russian) 9 апреля (ст.ст.) 22 апреля 2013 (нов. ст.) Archived 2014-02-22 at the Wayback Machine. Русская Православная Церковь Отдел внешних церковных связей.

wikipedia.org

ru.wikipedia.org

See: (in Russian) Мисаил (архиепископ Рязанский). Википедии. (Russian Wikipedia).