Ephysius
Christian martyr
Feast: 15 January (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Who they were
Ephysius of Sardinia (250?–303?) is a Christian martyr. Nothing is known of his life, except his martyrdom. He is the patron of Cagliari, which is the capital of the island of Sardinia, in Italy. He is especially revered in the city, where his relics lie.
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.
- santiebeati.it - Sant' Efisio di Cagliari, Martire (15 gennaio) — Martyr venerated in Sardinia, 3rd-4th century, relics at Cagliari, great civic veneration since 1793. Feast 15 January matches. Also in the Dominican martyrology ('At Cagliari in Sardinia, St. Ephysius, martyr').
- Wikidata Q1343711 — dates, feast day and identifiers (CC0)
- English Wikipedia — Ephysius (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.