January 17 is celebrated as the Feast of Saint Anthony the Great, one of the founders of Christian monasticism. The day holds significance for those who bear the name in Belgium.
- Antoine – The French form of Anthony, from the Roman family name Antonius, possibly meaning priceless or of inestimable worth. It honors Saint Anthony the Great, known for his life of prayer and solitude in the Egyptian desert.
- Toon – The Dutch and Flemish diminutive of Antonius or Anthony, commonly used in Flanders. It carries the same meaning and association with Saint Anthony.
