Katherine O'Neill was born in 1878 in Richmond, Virginia.

Katherine, her parents, her brother William, and her O'Dwyer grandparents were living in Richmond for the 1880 census.

Katherine's father William was a stonecutter. He died in 1886 in Richmond. Katherine's mother Nora married Pleasant Horace Dunnington in 1889 in Richmond. Nora was living at 2915 Williamsburg Avenue in Richmond in 1891.

Katherine and her younger sisters were living in Richmond with their aunts Ellen Welch and Kate O'Dwyer for the 1900 census.

Katherine and Dennis O'Sullivan married in 1905 in Richmond.

Katherine died in 1916 at the Pine Camp Tuberculosis Hospital in Richmond.

References:
• 1880 Richmond, Virginia census record: https://www.familysearch.org/ark:/61903/1:1:MC58-JSV .
• 1880 Richmond death record for brother Willie O'Neil: https://www.familysearch.org/ark:/61903/1:1:X5YS-PM7 .
• 1884 Richmond death record for grandfather Patrick O'Dwyer: https://www.familysearch.org/ark:/61903/1:1:X5BH-38M .
• 1884 Richmond birth record for sister Mary O'Neal: https://www.familysearch.org/ark:/61903/1:1:X52J-JWL .
• 1886 Richmond death record for father William J. O'Neill: https://www.familysearch.org/ark:/61903/1:1:X5BC-1NL .
• 1889 Richmond marriage record for mother Nora O'Neill: https://www.familysearch.org/ark:/61903/1:1:XRX4-WP9 .
• 1894 Richmond death record for grandmother O'Dwyer: https://www.familysearch.org/ark:/61903/1:1:X5BX-SM6 .
• 1900 Richmond census record: https://www.familysearch.org/ark:/61903/1:1:MMJY-WZ6 .
• 1905 Richmond marriage record: https://familysearch.org/ark:/61903/1:1:XRN1-W5N .
• 1907 Richmond marriage record for sister Mary M. O'Neil.
• 1909 Richmond death record for sister Nellie O'Neil: https://www.familysearch.org/ark:/61903/1:1:X5Y5-SVW .
• 1916 Richmond death certificate.
• 1936 Richmond death certificate for aunt Kate O'Dwyer.

Katherine O'Neill was born in 1878 in Richmond, Virginia.

Katherine, her parents, her brother William, and her O'Dwyer grandparents were living in Richmond for the 1880 census.

Katherine's father William was a stonecutter. He died in 1886 in Richmond. Katherine's mother Nora married Pleasant Horace Dunnington in 1889 in Richmond. Nora was living at 2915 Williamsburg Avenue in Richmond in 1891.

Katherine and her younger sisters were living in Richmond with their aunts Ellen Welch and Kate O'Dwyer for the 1900 census.

Katherine and Dennis O'Sullivan married in 1905 in Richmond.

Katherine died in 1916 at the Pine Camp Tuberculosis Hospital in Richmond.

References:
• 1880 Richmond, Virginia census record: https://www.familysearch.org/ark:/61903/1:1:MC58-JSV .
• 1880 Richmond death record for brother Willie O'Neil: https://www.familysearch.org/ark:/61903/1:1:X5YS-PM7 .
• 1884 Richmond death record for grandfather Patrick O'Dwyer: https://www.familysearch.org/ark:/61903/1:1:X5BH-38M .
• 1884 Richmond birth record for sister Mary O'Neal: https://www.familysearch.org/ark:/61903/1:1:X52J-JWL .
• 1886 Richmond death record for father William J. O'Neill: https://www.familysearch.org/ark:/61903/1:1:X5BC-1NL .
• 1889 Richmond marriage record for mother Nora O'Neill: https://www.familysearch.org/ark:/61903/1:1:XRX4-WP9 .
• 1894 Richmond death record for grandmother O'Dwyer: https://www.familysearch.org/ark:/61903/1:1:X5BX-SM6 .
• 1900 Richmond census record: https://www.familysearch.org/ark:/61903/1:1:MMJY-WZ6 .
• 1905 Richmond marriage record: https://familysearch.org/ark:/61903/1:1:XRN1-W5N .
• 1907 Richmond marriage record for sister Mary M. O'Neil.
• 1909 Richmond death record for sister Nellie O'Neil: https://www.familysearch.org/ark:/61903/1:1:X5Y5-SVW .
• 1916 Richmond death certificate.
• 1936 Richmond death certificate for aunt Kate O'Dwyer.