Lawyer and filipino politician, born in Udiong (province of Bataan, Luzon) on March 2, 1847, and died on December 23, 1920, which was the first Supreme Court of the Philippines after the Spanish colonial period and played an important role in the early days of American dominance as a representative of the new legal institutions of their country.
Son of a Spanish official, Cayetano Arellano made basic studies at the prestigious College of San Juan de Letran, obtaining excellent ratings, and then entered the University of Santo Tomas, where he/she studied law, philosophy and theology. After graduating (1876) practiced some years the post of judge in Tarlak, and in 1882 he/she returned to Manila to take charge of the Chair of civil law. In his years of University Professor he/she taught some of the future leaders Filipino, with Manuel Quezón and Sergio Osmeña to the head. Manila Councillor from 1877, was however in 1886 when it won office launched its prestigious judicial career: Deputy Judge of the Territorial Court of the Philippine capital. Mood very moderate man, stood aside from the revolutionary outbreak of 1896 preferring to withdraw temporarily from public life and return to the private practice of law.
With the proclamation of the Republic independent (June 1898) was to hold the portfolio of Foreign Affairs of the new regime, although his involvement with the Philippine cause during the Philippine–American conflict was involved in the controversy, as evidenced by the fact that soon accepted to serve the bureaucracy established by the United States. Indeed, the American Administration appointed first Chairman of the Board of the Civil Service and on May 29, 1899, President of the newly created Court Supreme of the Philippines, becoming the first of his countrymen in hold such dignity; on the other hand, it declined to be Foreign Secretary. In 1904 President Theodore Roosevelt appointed him their representative. Yale University awarded him the honorary doctorate in law in recognition to its merits, a distinction which is granted on rare occasions.