Margaret of Scotland, St.

Margaret of Scotland, Saint and Queen
Mazarin, Cardinal

Jules Cardinal Mazarin was born as Guilio Raimondo Mazzarino on 14 July 1602, he was a diplomat and politician who served as chief minister of France from 1642 until his death in 1661. He succeeded his mentor Cardinal Richelieu and was a noted collector of art, jewels books and money.
McGuigan, Cardinal

Cardinal James Charles McGuigan was born 26 Nov 1894 to an Irish Catholic family that emigrated from Northern Ireland just before the Famine.
McNulty

Bishop James McNulty
Melchtide of Saxony

Born 10 April 1240/1, died 19 Nov 1298, Melchtide ( Matilda ) to the high noble Thuringian family of von Hackeborn and von Wippra at their castle and estate of Heltfa near Eisleben. They were great nobles and powerful barons and counts in Saxony, Germany.
Merry del Val

Rafael Cardinal Merry del Val
Mindszenty, Cardinal

Cardinal József Mindszenty (9 March 1892 – 6 May 1975)
More

St. Thomas was born on 7 Feb 1478 in London and died on 6 July 1535 in London
Morrow

Louis LaRavoire Morrow, was born on 24 December 1892
Mundelein, Cardinal

George Cardinal Mundelein, Archbishop of Chicago was born on 2 July 1872 in Manhattan to Francis and Mary (née Goetz) Mundelein.