This birth record is off by one day. It provides a book and page number, it might be worth it to try to get a copy and see if Fanny/Fancy's maiden name is listed.
Pennsylvania, Philadelphia City Births, 1860-1906
Citing this Record: "Pennsylvania, Philadelphia City Births, 1860-1906," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/VBRP-HXZ), Alfreda K. Neill, 24 Oct 1880; citing bk 1880 p 83, Department of Records; FHL microfilm 1289320.
Name: Alfreda K. Neill
Birth : 24 Oct 1880 Philadelphia, Philadelphia, PA
Father: Thomas W. Neill Mother: Fanny B. Neill
Reference ID: Book 1880: p. 83
The record below is a possible wife???
District of Columbia Deaths, 1874-1959
Citing this Record: "District of Columbia Deaths, 1874-1959", index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/F7TS-FVZ ), Fanny Badger Neill, 1892.
Name: Fanny Badger Neill
Death: 06 Jan 1892 District of Columbia, United States
Female Age: 51 Married
Birth (Est): 1841 Birthplace: Philadelphia, Penna.
Burial Place: Bristol, Pa.
Father's Birthplace: Penna.
Mother's Birthplace: Penna.
This Fanny Badger appears to be the daughter of William and Hannah Badger.