• a term in the Catholic Church for a person (Beata if female) who has been beatified
  Beatification
  Beatification is a recognition accorded by the Catholic Church of a dead person's entrance into Heaven and capacity to intercede on behalf of individuals who pray in his or her name . Beatification is the third of the four steps in the canonization process...
  
  , the stage before being declared a saint.

• A copy of the Commentary on the Apocalypse
  Commentary on the Apocalypse
  Commentary on the Apocalypse was originally an eighth century work by the Spanish monk and theologian Beatus of Liébana. Today, it refers to any of the extant manuscript copies of this work, especially any of the 26 illuminated copies that have survived. It is often referred to simply as the Beatus...
  
  , (i.e. Book of Revelation), especially in illuminated manuscript form, written by Saint Beatus of Liébana (below), is often just referred to as a Beatus. Many famous versions exist, especially in the Mozarabic style, such as the Morgan Beatus.

• A "beatus initial" is the B of "Beatus vir..." ("Blessed is the man..."), the start of Psalm 1. This was usually given the most elaborate decoration in an illuminated psalter
  Psalter
  A psalter is a volume containing the Book of Psalms, often with other devotional material bound in as well, such as a liturgical calendar and litany of the Saints. Until the later medieval emergence of the book of hours, psalters were the books most widely owned by wealthy lay persons and were...
  
  , often taking a whole page for the B or first two words.

Individual persons

• Beatus of Lungern
  Beatus of Lungern
  Beatus of Lungern, known also by the honorific Apostle of Switzerland or as Beatus of Beatenberg or Beatus of Thun, was a probably legendary monk and hermit of early Christianity, and is revered as a saint...
  
  or Saint Beatus of Beatenberg or Thun, a semi-legendary figure who is considered the saint of Switzerland.

• Saint Beatus, Bishop of Amiens, France in the 5th century

• Saint Beatus of Liébana
  Beatus of Liébana
  Saint Beatus of Liébana was a monk, theologian and geographer from the Kingdom of Asturias, in modern northern Spain, who worked and lived in the Picos de Europa mountains of the region of Liébana, in what is now Cantabria and his feast day is February 19.-Biography:He created an important...
  
  , a Spanish monk who lived in the 8th century, in San Martin de Turieno in Liebana. Best known for his Commentary on the Book of Revelation - see above.

• Beatus of Vendôme

• Beatus Rhenanus
  Beatus Rhenanus
  Beatus Rhenanus , also known as Beatus Bild, was an Alsatian humanist, religious reformer, and classical scholar....
  
  (also known as Beatus Bild), who lived 1485 -1547, a German humanist, religious reformer, and classical scholar.