The Blessed Agnellus of Pisa was an Italian Franciscan monk. His feast day is variously observed on May 7 or September 10 but many celebrate it on March 13th

St Constantine was king of Cornwall. Unreliable tradition has him married to the daughter of the king of Brittany who on her death ceded his throne to his son. 

St. John Ogilvie was Born in 1579. Exposed to the religious controversies of his day and impressed with the faith of the martyrs, he decided to become a Catholic. 

St. Colette Colette was the daughter of a carpenter named DeBoilet at Corby Abbey in Picardy, France. She was born on January 13. Her feast day is March 6th.

St Casimir was born in Wawel Castle in Kraków. Casimir was the third child and the second son of the King of Poland and Grand Duke of Lithuania Casimir IV

Charles the Good was born in Denmark, only son of the three children of King Canute IV. Erembald family entered the church and hacked Charles to death with broadswords.

St David was the son of King Sant of South Wales. He was ordained a priest and later studied under St. Paulinus. His feast day is celebrated on March 1st. 

St. Hilary was born in Sardinia. He was a Pope from 461-468 at guardian of Church unity.  Hilary consolidated the Church in Sandi, Africa, and Gaul. He died in Rome on February 2

St. Leander of Seville was born in Cartagena, Spain, of Severianus and Theodora. Seville became a monk at Seville and then the bishop of the See.

St. Isabel of France the sister of St. Louis and daughter of King Louis VIII.  She ministered to the sick and the poor. She died there on February 23, and her cult was approved in 1521.