Rosanna Hannigan (1868-1915) was born in Mott Haven area of the South Bronx in the late 1877. She first appears in the 1880 US Census with her parents and four siblings. She was the third daughter to this young family. Since New York did not require birth records until the 1880s, a state birth certificate has not been located for her. She grew up with her other six siblings in the Mott Haven area of the South Bronx.
- Rosanna Hannigan (1877-1925)
- {married Henry Edgar Acker (1850-1918) in 1896 in North New York City}
- William C Acker (1897-1947) {never married}
- {married Charles Denton (????-????) in ????}
- Grace Deloras Denton (1901-1959) {married David Samuel Berry (1887-1976) in 1937 in Hollywood, California}
- {married Dr. Salem Goodale (1872-1931) in 1910 in San Francisco, California}
- {married Henry Edgar Acker (1850-1918) in 1896 in North New York City}