Dennis Day , born Owen Patrick Eugene McNulty, was an American singer, radio, television and film personality and comedian of Irish descent.
Day was born and raised in The Bronx New York City in the Throggs Neck section the second of five children born to Irish immigrants Patrick McNulty and Mary McNulty. His father was a factory electric power engineer. Day graduated from Cathedral Preparatory Seminary in New York City, and attended Manhattan College in the Bronx, where he sang in the glee club.
Source: Wikipedia