Picture: Albert Bridge · CC BY-SA 2.0 · Wikimedia Commons

Sillan

mediaeval Irish abbot and saint

SaintPre-congregation

Born

—

unknown

Died

609

Beatified

—

not needed: before formal processes

Canonised

By tradition

recognised before formal processes began

Who they were

Saint Sillan (or Sillian) (Latin: Selanus; Irish: Síoláin) (died 608 or 610) was early Irish saint and abbot of Bangor Abbey, Bangor, County Down. He was recorded as being a disciple and second or third successor of Saint Comgall, who was the founder and first abbot of the Benedictine monastery at Bangor. The village of Kilsheelan, County Tipperary is named after him. His Irish name is Sioláin which can translate to either "seed-basket" or "cullender/sieve".

Summary from Wikipedia (CC BY-SA 4.0), until this page is written up in full.

The miracles

Limited information is available on this saint so far.

Why that counted as sanctity

Limited information is available on this saint so far.

Sources

CatholicSaints.Info — Saint Sillan of Bangor — Irish abbot of Bangor, died about 610; the Benedictine Book of Saints also carries him.
Wikidata Q4419266 — dates, feast day and identifiers (CC0)
English Wikipedia — Sillan (CC BY-SA)

Not yet written up in full. The Catholic source above names this person; the name, dates and step come from Wikidata and are not yet checked against Church records.