BORN. To Maria Imelda ("Imee") Marcos, 27, older daughter of Philippine President Ferdinand and First Lady Imelda Marcos, and Tomas Manotoc, 33, divorced amateur sportsman whom she married in Virginia 16 months ago: their first child, a son (he has two children by a previous marriage that under Philippine law is indissoluble); in Honolulu. Name: Fernando Martin. Weight: 6 Ibs. 8 oz. Her parents were bitterly opposed to the romance because of his marital status, and the couple had lived largely apart. But in March they went to Hawaii so that the baby could be born in the U.S.--and legitimate.

BORN. To Valerie Velardi, 31, ballet dancer, and her husband of five years, Robin Williams, 30, hyperkinetic comic actor (Popeye, The World According to Garp and TV's Mork and Mindy): their first child, a son; in San Francisco. Name: Zachary. Weight: 7 Ibs. 6 oz.

DIED. Phillip Burton, 56, eleven-term Democratic California Congressman whose skills at political dealmaking and infighting made him one of the most influential members of the House; of a ruptured aorta; in San Francisco. He called himself a "fighting liberal"; with the build, voice and vocabulary of a longshoreman from his San Francisco district, he fit the part. But he was pragmatic and persuasive in pursuing liberal goals, including higher minimum wages, mine safety, improved old age and disability benefits, and the creation of national parks. In 1976 he came within one vote of becoming majority leader, losing in part because of his aggressiveness.

DIED. Dolores Del Rio, 78, enduringly beautiful Mexican movie actress; in Newport Beach, Calif. Even in the silent era she tended to be typecast in such films as Ramona (1928) and The Loves of Carmen (1927); after sound, her accent limited her still further, though she starred in Flying Down to Rio (1933) and Madame Du Barry (1934). Finally sick of the Hollywood yoke, she returned to Mexico and helped establish the country's movie industry, notably with Maria Candelaria in 1943.

DIED. Norbert Pearlroth, 89, researcher who, believe it or not, from 1923 to 1975 was the sole discoverer and documentor of all the obscure and fascinating trivia that made up the syndicated comic strip Ripley's Believe It or Not; of heart and kidney diseases; in New York City. Hired by Strip Creator and Illustrator Robert Ripley for his linguistic abilities and memory for detail, Pearlroth thereafter spent seven days a week every week in the New York Public Library, unearthing at least 62,192 amazing facts and anecdotes. One skeptical reader wrote 27,167 double-checking letters to sources and never found an unsubstantiated item. This file is automatically generated by a robot program, so viewer discretion is required.