Laura Branigan
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Branigan was born in Brewster, New York, fourth of five children of Kathleen OHare Branigan and James Branigan, Sr., an account executive and mutual funds broker, who later separated. Her younger brother Billy Branigan was born on February 28, 1957. She had two older brothers, James, Jr. Jim and Mark and an elder sister, Susan. Branigans maternal grandparents were William OHare, Jr. and Mary Conway all of them were Irish.
Source: Wikipedia