Canon is a Christian title usually used to refer to a member of certain bodies in subject to an ecclesiastical rule.
Four Canons with SS Augustine and Jerome by an Open Grave, with the Visitation. Master of the Spes Nostra [nl] (active c. 1500–1520, Northern Netherlands)
Petrus-Ludovicus Stillemans (1821–1902), brother of Antoon Stillemans and honorary canon of St Bavo's Cathedral, Ghent
A Flemish canon in official clerical dress of canons
A canon ceremonially receives Cardinal Franc Rodé., C.M.
The Canons Regular are Catholic priests and religious brothers who live in community under a rule and are generally organised into religious orders, differing from both secular canons and other forms
Canon (title)
…to adopt the rule first proposed by Saint Augustine that they renounce private wealth. Those who embraced this change were known as Augustinians or Canons Regular, whilst those who did not were known as secular canons. In the Latin Church, canons are the members of a chapter, that is a body of senior clergy…
Visitation memento mori, painter unknown, c.1500, juxtaposing pregnancy and death, with four Augustinan canons regular of the Chapter (Abbey) of Sion. Left, with little lion, is Jerome; right, holding a heart, is Augustine. Rijksmuseum
Bishop Chrodegang of Metz
Ballybeg Priory, founded in 1229 by Philip de Barry for the Canons Regular of St Augustine
Abbess Joanna van Doorselaer de ten Ryen, Waasmunster Roosenberg Abbey.