Dutherius is a 3rd-century

Early Church Early Christianity (up to the First Council of Nicaea in 325) spread from the Levant, across the Roman Empire, and beyond. Originally, this progression was closely connected to already established Jewish centers in the Holy Land and the Jewish ...

saint In religious belief, a saint is a person who is recognized as having an exceptional degree of Q-D-Š, holiness, likeness, or closeness to God. However, the use of the term ''saint'' depends on the context and Christian denomination, denominat ...

martyr A martyr (, ''mártys'', "witness", or , ''marturia'', stem , ''martyr-'') is someone who suffers persecution and death for advocating, renouncing, or refusing to renounce or advocate, a religious belief or other cause as demanded by an externa ...

and bishop of Nice His

feast day The calendar of saints is the traditional Christian method of organizing a liturgical year by associating each day with one or more saints and referring to the day as the feast day or feast of said saint. The word "feast" in this context d ...

is celebrated on 5 December.Jean-Baptiste Boone, De prosecutione operis bollandiani quod Acta Sanctorum inscribitur (the Typographia F.-J. Douxfils, 1838)
p30

References

Gallo-Roman saints 3rd-century Christian martyrs Year of birth unknown 3rd-century bishops in Gaul 3rd-century Christian saints Bishops of Nice {{France-bishop-stub