Picture: Eric Jones · CC BY-SA 2.0 · Wikimedia Commons

Peirio

Welsh saint

SaintPre-congregation

Born

401

Died

—

unknown

Beatified

—

not needed: before formal processes

Canonised

By tradition

recognised before formal processes began

Who they were

Saint Peirio was a 6th-century pre-congregational saint of Wales and a child of King Caw of Strathclyde.

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 Q17984787 — dates, feast day and identifiers (CC0)
English Wikipedia — Peirio (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.