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Matronian
hermit
SaintPre-congregation
Feast: 14 December (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
—
unknown
Died
500
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
Matronian(us) (Italian: San Matroniano) was a hermit of Milan. It is recorded that Ambrose enshrined Matronian's relics in the church of San Nazaro Maggiore in Milan.
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.