Denis (1883-1903) and Minnie Hannigan (1882-1961) were each born in New York City in the 1880’s. They went on to have one son who was born after Denis was fatally injured in an accident in the New York, New Haven & Hartford Railroad yard in the Bronx. Minnie married George Theodore Moeckel after Raymond was born and they had two additional children. The list below brings the offspring of this family line.
- Denis Michael Hannigan (1883-1903)
- Denis married Minne Elizabeth Madaus (1882-1961) in December 1902
- Raymond Hannigan (1903-1945)
- Raymond married Theresa Jarzembowski (1906-1970) in 1927
- Helen M Hannigan (1931-2012)
- Helen married Andrew Stroh (1926-2002)
- Mary Hannigan (1932-2019)
- Mary married Wallace David Lohbauer (1930-1998)
- Mary married UNK Shanahan {????-????)
- George T Hannigan (1938-2009)
- George married Francesca Magro (1939-2015)
- Helen M Hannigan (1931-2012)
- Raymond married Theresa Jarzembowski (1906-1970) in 1927
- Raymond Hannigan (1903-1945)
- Minnie married George Theodore Moeckel in August 1903.
- George Moeckel (1904-????)
- Anna Moeckel (1906-????)
- Denis married Minne Elizabeth Madaus (1882-1961) in December 1902