Noun
martyrologium (plural martyrologia)
Synonym of martyrology (“catalogue of martyrs”)
More recent editions of the Roman Martyrology Martyrologium Romanum (Libreria Editrice Vaticana, 2001 ISBN 88-209-7210-7) have instead: At Rome, at the third milestone on the Via Portuensis, in the cemetery dedicated to his name, Saint Felix, martyr. Source: Internet
"Martyrologium Romanum" (Libreria Editrice Vaticana, 2001 ISBN 88-209-7210-7) In 1839, when the new feast of St Alphonsus Mary de Liguori was assigned to 2 August, Saint Stephen I was mentioned only as a commemoration within the Mass of Saint Alphonsus. Source: Internet
"Martyrologium Romanum" (Libreria Editrice Vaticana, 2001 ISBN 88-209-7210-7) The Annuario Pontificio gives both forms as alternatives. Source: Internet