Rais’s name day is September 23, the feast of Rais of Alexandria.
Churches that follow the Old (Julian) Calendar keep the same feast on October 6 of the civil calendar. See everything commemorated on September 23.
The saint behind the name
Rais of Alexandria
September 23, Holy Woman, Ραΐς
St. Rais was a young Christian woman of Alexandria who, seeing a company of Christians in chains being led to the ship that would carry them to trial, freely joined them and confessed Christ. She was beheaded with them in Egypt in the persecution of the early fourth century.
Also celebrating on September 23
These names share the feast, many of them other forms of the same name:
What to say on a name day
The Greek wish is Χρόνια Πολλά (Chronia Polla), “many years.” A call or a short message on the day is what people remember. See name day wishes you can send and what a name day is.