All the following saints are celebrated on March 17:
Agricola of Châlon-sur-Saône
Alexander
Ambrose of Alexandria
Diemut of Saint Gall
Gertrude of Nivelles
Guido Maria Conforti
Jan Sarkander
Juan Nepomuceno Zegrày Moreno
Joseph of Arimathea
Martyrs of Seramis
Patrick
Paul of Cyprus
Stephen of Palestrina
Theodore of Rome
Thomasello
Ireland has a number of patron saint but the best known is Saint Patrick who is celebrated on March 17.
It commemorates the death of Ireland's patron saint.
Saint Patrick's day is celebrated on March 17 because Saint Patrick, the most well known of the Irish patron saints, died on the 17th of March 461 A.D.
If you were born on March 17 then Saint Patrick is your secondary patron saint (after your namesake) and deserves some special recognition from you on that day.
St. Patrick whose feast day is March 17 - St. Patrick's Day.
March 17 is the feast day of Saint Patrick.
St. Anthony of Egypt, the abbot, is a patron saint of animals and his feast day is January 17.
Religion
Saint Patrick's Day is March 17.
St. Patrick, the Patron Saint of Ireland, died on 17 March 461 AD and the day has been celebrated ever since.
Not a saint or a patron saint. Not even dead. (as of March 2015)
The Patron Saint Inex lists no patron saints of bears.