CASILDA, a Moor who converted to Christianity. St. Casilda lived an hermitic life near Briviesca in present-day Castile and León, Spain. She reposed circa 1050.

DOTTO, (Sixth Century?), in De Scotorum Fortitudine (his Scottish Menology), Camerarii (Roman Catholic Priest and Educator David Chambers †1641) lists St. Dotto as the abbot of a monastery in the Orkney Islands off the northern coast of Scotland. According to Scottish Episcopal Bishop and Scholar, The Rt. Revd. Alexander Penrose Forbes' (†1875) Kalendar of Scottish Saints and English Roman Catholic priest and renowned hagiographer Fr. Alban Butler's (†1773) Lives of the Saints the monastery was on an island (Forbes states one of the main islands) named for the saint, whom Butler claims to have lived for nearly one hundred years. However, in the Acta Sanctorum the Bollandists point out there is no mention of an island by the name Dotto on any map or in any history of the Orkneys of the last few hundred years. The Bollandists go on to state that there is no mention of this saint in either Scottish Scholar and Academic Thomas Dempster’s (†1625) Menologium Scoticum, or in the Aberdeen Breviary, thus casting doubt as to St. Dotto's very existence. However, his veneration has survived, at least in a limited form, to this day.

HEDDA, THEODORE, and COMPANIONS, also known as the Martyrs of Croyland, St. Hedda was Abbot of Peterborough, St. Theodore was Abbot of Crowland, they were martyred along with at least eighty other monks from these and surrounding monasteries by the Danes circa 869. Also, included in this group is St. Torthred (Touredec), to whom a church in Brittany is dedicated; St. Elfgete, a deacon; St. Sabinus, a subdeacon; SS. Askega, Swethin, Egdred, Ulric, as well as SS. Grimkeld and Agamund, who were both centenarians.

HUGH of ROUEN, he received monastic tonsure at the Abbey of St. Peter / abbaye Saint-Pierre (later the Abbey of St. Wandrille / abbaye Saint-Wandrille) in Fontenelle, Normandy (France) whilst still a youth. Later St. Hugh was appointed Vicar-General of Metz (north-eastern France), then in 722 consecrated Bishop of Rouen (Normandy, France). Later he was translated to the Diocese of Paris, concurrently serving as Abbot of both Fontenelle and the Abbey of St. Peter of Jumièges (abbaye Saint-Pierre de Jumièges — Jumièges Abbey) in Normandy. St. Hugh resigned his offices to live as a simple monk at Jumièges. St. Hugh reposed in 730.

MADRUN (MATERIANA), (Fourth Century), St. Madrun was a native of either Wales or Cornwall. Two churches in Cornwall and one in Wales are dedicated to her. Nothing further is known of this saint.

MARCELLUS, the successor of his brother, St. Petronius (10th January), as Bishop of the Diocese of Die in south-eastern present-day France. During his long episcopate, St. Marcellus endured a great deal of torment from Arians. He reposed in 474.

MARTYRS of NORTH-WEST AFRICA, (Date Unknown), a group of Christians martyred in North-Western Africa, most likely Mauritania Tingitana (roughly the northern part of present-day Morocco).

MARTYRS of PANNONIA, (Date Unknown), seven Christians said to have been martyred in Sirmium, Pannonia (present-day Sremska Mitrovica, Serbia). However, contemporary research has been unable to find any evidence of their existence.

WALDETRUDIS (VAUDRU), a daughter of SS. Walbert (11th May) and Bertilia (3rd January), wife of St. Vincent Madelgarus (20th September) and mother of SS. Landericus (10th June), Dentelin (16th March), Madalberta (7th September), and Aldetrudis (25th February). Both St. Waldetrudis and her husband longed-for lives devoted completely to prayer and meditation, and so, St. Waldetrudis convinced St. Vincent to enter a monastery, and she followed two years later. St. Waldetrudis was the foundress of a community around which the town of Mons, Belgium, grew up. There St. Waldetrudis lived as a simple monastic, spending her days in prayer and meditation, she reposed circa 688.

AGAPITUS I, elected the fifty-seventh Pope of Rome on 13th May 535, and reposed on 22nd April, 536. St. Agapitus was a staunch opponent of Monophysitism, and though his pontificate was brief, he managed to have the Monophysite Patriarch of Constantinople Anthimus deposed (536) and for St. Mennas (25th August) to succeed him.

ARWALD, Arwald was a prince in the Isle of Wight whose two sons were put to death by soldiers of the then — Pagan King Cædwalla (later King St. Cædwalla 20th April) on the day after their baptism in 686. As there is no longer a record of their names extant, they are known by the name of their father. The limited information that is known is from St. Bede the Venerable (25th May) who, in his Historia Ecclesiastica, documented these few details.

CAIUS (GAIUS, CAIVS), there is no reliable information about his early life, though there is a legend which states he was a native of the Dalmatia region of present-day Croatia, related to the Emperor Diocletian (r. 284–305), and the uncle of St. Susanna (11th August). St. Gaius was elected the twenty-eighth Pope of Rome in December 283, originally said to have been martyred with members of his family in 296, however, there now is uncertainty as to the accuracy of this account.

EPIPODIUS and ALEXANDER, two young friends in Lyons (east-central France) who dedicated their lives to serving Christ. in 178, during the persecutions under Emperor Marcus Aurelius (r. 161–180), they were arrested, tortured, and martyred. St. Alexander and companions are also commemorated on 24th April.

LEO of SENS, consecrated the sixteenth or seventeenth Bishop of Sens (north-central France) circa 518. St. Leo served his See for twenty-three years until his repose in 541.

OPPORTUNA, the sister of St. Chrodegang (6th March), Bishop of Séez (Normandy, France). While still quite young she received monastic tonsure from her brother and entered the convent called Monasteriolum (little monastery) near Almenèches (north-western France), around which the village of Montreuil-la-Cambe grew. In later life St. Opportuna was elected Abbess of the community, serving until her repose circa 770.

SENORINA, a daughter of nobility and relative of St. Rudesind of Mondoñedo (1st March), St. Senorina was raised by her aunt Godina, Abbess of the monastery of St. John in present-day Vieira do Minho, Portugal. She later received monastic tonsure, and eventually succeeded her aunt as Abbess. While Abbess, St. Senorina relocated the monastery to the village of Basto 21 km / 13 mi to the south-east of Vieira do Minho. St. Senorina reposed circa 982.

SOTER, the twelfth Pope of Rome (162 or 168 – 170 or 177). Nothing of his life prior to becoming Pope, and little is known of his pontificate. According to tradition St. Soter was martyred, however, there is no documentation extant which supports this.