Contentius (died 510) was bishop of Bayeux from 480 until his death. He is a Catholic and Orthodox saint. His feast day is January 19.

Saint Dominic (Spanish: Santo Domingo), also known as Dominic of Osma and Dominic of Caleruega (occasionally Calaruega), often called Dominic de Guzmán and Domingo Félix de Guzmán (1170 – August 6, 1221) was the founder of the Friars Preachers, popularly called the Dominicans or Order of Preachers (OP), a Roman Catholic religious order. Dominic is the patron saint of astronomers.

Dominic was born in Caleruega, halfway between Osma and Aranda de Duero in Old Castile, Spain. He was named after Saint Dominic of Silos, who is said to be the patron saint of hopeful mothers, astronomers. The Benedictine abbey of Santo Domingo de Silos lies a few miles north of Caleruega.

In the earliest narrative source, by Jordan of Saxony, Dominic's parents are not named. The story is told that before his birth his mother dreamed that a dog leapt from her womb carrying a torch in its mouth, and "seemed to set the earth on fire". This story is likely to have emerged when his order became known, after his name, as the Dominican order, in Latin is Dominicanus and by a play of words was interpreted as Domini canis: "Dog of the Lord." Jordan adds that Dominic was brought up by his parents and a maternal uncle who was an archbishop. The failure to name them is not surprising, since Jordan's work is a history of the early years of the Order rather than a biography of Dominic. A later source, still of the 13th century, gives the names of Dominic's mother and father as Juana and Felix. Nearly a century after Dominic's birth, a local author asserts that Dominic's father was "vir venerabilis et dives in populo suo" ("an honoured and wealthy man in his village"). The earliest statement that Dominic's father belonged to the family de Guzmán, and that his mother belonged to the Aça or Aza family, occurs in the travel narrative of Pero Tafur, written in 1439 or soon after.

Dominic Savio (Italian: Domenico Savio; April 2, 1842 – March 9, 1857) was an Italian adolescent student of Saint John Bosco. He was studying to be a priest when he became ill and died at the age of 14, possibly from pleurisy.

His teacher, John Bosco, had very high regard for Savio, and wrote a biography of his young student, The Life of Dominic Savio. This volume, along with other accounts of him, were critical factors in his cause for sainthood. Despite the fact that many people considered him to have died at too young an age – fourteen – to be considered for sainthood, he was considered eligible for such singular honour on the basis of his having displayed "heroic virtue" in his everyday life. He is the only saint of his age group, which includes Maria Goretti (age 11) and Ponticus of Lyons (age 15), who was declared to be a saint not on the basis of his having been a martyr, but on the basis of having lived what was seen as a holy life. He was canonised a Saint on June 12, 1954 by Pope Pius XII, making him the youngest non-martyr to be canonised in the Catholic Church.