Frank Mario Angellotti was born in San Rafael, California, on September 4, 1861, son of Giuseppe and Frances L. Osgood Angellotti. His father was a native of Italy, and his mother was from the state of Maine. Frank Angellotti attended private school and Lowell High School in San Francisco, graduating in 1879. He studied law with Judges Darwin and Murphy of San Francisco, and also attended Hastings Law School, from which he graduated with a Bachelor of Laws degree in 1882. Admitted to the bar by the State Supreme Court in August 1882, he began to practice law in his native town of San Rafael. In November, 1884, at age 23, he was elected District Attorney of Marin County, thus becoming the first native-born Marinite and the youngest person ever to hold that office. He remained the District Attorney until 1890 when at age 29 he was elected Judge of the Superior Court of Marin County, one of the youngest persons ever elected to that position. He served on the Marin County Superior Court bench for twelve years until 1903. In January 1903, at age 41, he was appointed to the California Supreme Court as an associate justice. In January 1915, at age 53, he was appointed Chief Justice of the California Supreme Court thus becoming the first native born Californian to hold that position. Angellotti resigned as Chief Justice on November 15, 1921, and thereafter returned to private practice and became general counsel for the Western Pacific Railroad Company. Angellotti married Emma C. Cearley on December 27, 1884. In addition to being a member of the Society of Colonial Wars, Angellotti was a member of the Marin Masonic Lodge No. 191 of which he was a Past Master in 1888 through 1890. He also held the position of Grand Master of the Masonic Grand Lodge of California in 1898 and 1899. He died at age 70 on May 23, 1932.