Born. To Julius ("Groucho") Marx, 55, cigar-waving, eye-rolling youngest of the caper-cutting Marx trio, and Catherine ("Kay") Marvis, 25: their first child; in Los Angeles. Name: Melinda. Weight: 5 Ibs. 14 oz.

Married. Baron Nathaniel Mayer Victor Rothschild, 35, head of the British branch of the great banking family, who forsook finance to become a Cambridge don; and Teresa Georgina Mayor, O.B.E., 30; he for the second time, she for the first; in London.

Married. Group Captain the Hon. John William Maxwell ("Max") Aitken, D.S.O., D.F.C., 36, Member of Parliament, elder son of newspaper publisher Lord Beaverbrook; and Mrs. Jane Lindsay, 26, granddaughter of the Duke of Abercorn, onetime Governor of Northern Ireland; both for the second time; in London.

Married. George Balanchine (real name: Georgei Melitonovich Balinchinvadze), 42, famed Russian-born choreographer, onetime director of the Piaghilev Russian Ballet and the American Ballet; and Ballerina Maria Tallchief, 21, his Irish-Osage Indian protegee; she for the first time, he for the fourth; in Manhattan.

Married. Baron Louis de Rothschild, 64, polo-playing former president of the Kreditanstalt, one-year Gestapo prisoner after Hitler's Anschluss; and Countess Hilda Auersperg, 44, onetime Austrian who became an American citizen; he for the first time, she for the third; in Locust Valley, L.I.

Died. Channing Pollock, 66, white-maned drama critic, playwright (The Fool, The House Beautiful, The Enemy), voluble lecturer and pamphleteer; of a cerebral hemorrhage; in Shoreham, L.I.

Died. William J. Gallagher, 71, retired street-cleaner who was elected to the 79th Congress from Minnesota's Third District, of a liver ailment; in Rochester, Minn. Said Representative Gallagher concerning his election: "This is the time for the common man, and I'm about as common as they come."

Died. Herbert George Wells, 79, Britain's prolific writer on any-&-every subject, fanciful and often accurate prognosticator of the shape of things to come; in London (see FOREIGN NEWS).

Died. Edward Riley Bradley, 86, onetime bookmaker and longtime "honest gambler," who became a multimillionaire as proprietor of Palm Beach's Casino, famed & respected owner of some of America's most famous race horses (Blue Larkspur, Bimelech, Bubbling Over), only four-time winner of the Kentucky Derby; in Lexington, Ky.

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