Francesco Fa%C3%A0 di Bruno
The Blessed Francesco Fa di Bruno was an Italian priest and advocate of the poor, and a leading mathematician of his era and a noted religious musician. In 1988 he was beatified by Pope John Paul II. He is the eponym of Fa di Brunos formula.
Fa di Bruno was born in Alessandria, then part of the Kingdom of Sardinia, onMarch 1825. He was of noble birth, being the twelfth and youngest child of the Marchese Luigi Fa di Bruno and the Lady Carolina Sappa de Milanesi. He was raised in a home marked by happiness, the arts and a concern for the poor arising from the parents strong Catholic faith.
Source: Wikipedia