Margit S. (Kirschblum) Horowitz, 88, of Southbury and formerly of Trumbull, died Feb. 4.  Born in Bridgeport, she was the daughter of the late Meyer and Goldie (Tischler) Kirschblum. She is survived her children, Dr. Robert Horowitz and his wife Catherine Nagel of Pelham, Mass., Justin Horowitz of Ulster Park, N.Y., Debby Horowitz and her husband Jay Klemundt of Middlebury, and Ellen Horowitz and her husband Frank Vitale of Columbia Falls, Mont.; her brother, Henry Kirschblum of Fairfield; and her grandchildren, Goldie Klemundt, Jeremy Klemundt, Adam Horowitz, Sarah Horowitz and Emily Horowitz. She was predeceased by her brothers, Harry Kirban and Bill Kirban, and her sisters Frances Hirshik and Bertha Abramowitz.