No likeness on file

Iserninus

Irish bishop

SaintIrelandPre-congregation

Born

—

unknown

Died

456

Beatified

—

not needed: before formal processes

Canonised

By tradition

recognised before formal processes began

Who they were

Saint Iserninus (or Isernius) (c. 456 AD) was an early Christian missionary of Ireland who is associated with Saint Patrick and Saint Auxilius in establishing Christianity in the south of that island. More recent research associates him not with Patrick but with Palladius.

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.

Sources

Wikidata Q6079731 — dates, feast day and identifiers (CC0)
English Wikipedia — Iserninus (CC BY-SA)

Not yet written up in full: no Church source with an account of this person has been found yet. The name, dates and step come from Wikidata and are not yet checked against Church records.