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Gereon
Soldier and martyr
SaintAncient RomePre-congregation
Feast: 10 October (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
201
Died
304
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
Gereon of Cologne (died c. 304), who may have been a soldier, was martyred at Cologne by beheading, probably in the early 4th century.
Summary from Wikipedia (CC BY-SA 4.0), until this page is written up in full.
The miracles
Limited information available on this saint.
Why that counted as sanctity
Limited information available on this saint.