Carlos Benjamin Orestes "Kokoy" Trinidad Romualdez[2] (September 24, 1930 – February 21, 2012) was a Filipino politician who served as Governor of Leyte and later appointed as ambassador to the United States, China and Saudi Arabia.

He was a younger brother to former First Lady Imelda Marcos and the father of House Speaker Ferdinand Martin Romualdez.

During this time, his brother-in-law, President Ferdinand Marcos also appointed him as ambassador to China, Saudi Arabia and the United States.

[4] Romualdez was instrumental in the establishment of diplomatic relations between the Philippines and the People's Republic of China in the 1970s, becoming Manila's first ambassador to Beijing.

[5] He was elected as a member of the Batasang Pambansa in 1984, but chose to remain ambassador to the United States, and was therefore disqualified to sit in the parliament.