Today is actually the day that Matthew Nunan passed away, January 7, 1916, and was born in 1834, or possibly 1836, or maybe even 1828, but the exact date or even month is unknown. There are even some sources that give his date of death as January 13. He was born in Limerick, Ireland, and emigrated to the U.S. when he was fourteen, settling in California in 1855. Lured there by dreams of striking it rich in the goldmines, he soon tried of mining, and first opened a grocery store in San Francisco, but eventually bought the Mission Street Brewery. When they moved the brewery and built a larger one, they renamed it the Hibernia Brewery. Matthew Nunan also served two terms as Sheriff of San Francisco, 1876-1877 and 1878-1879.
Gary Flynn has a more thorough Biography of Matthew J. Numan at his Brewery Gems website. He also has a lengthy history of the Mission Street Brewery (1860-1867) and [its] successor The Hibernia Brewery (1867-1920).