William married Ann Rowbottom on 6 Jul 1851 in St Botolph, Knottingley. Ann (daughter of Joseph Whiteley and Elizabeth Johnson, daughter of Farnill Rowbottom and Ann Marshall) was born in 1832 in Knottingley. [Group Sheet] [Family Chart]

1. Mary Ann Firth was born in 1853 in Knottingley.
2. Thomas Harrison was born on 28 Jun 1804 in Water Lane, Leeds.
3. George Firth was born in 1855 in Knottingley.
4. William Harrison was born on 17 May 1805 in Leeds.
5. Elizabeth Firth was born in 1857 in Knottingley.
6. Sarah Harrison was born on 30 Sep 1809 in Leeds.
7. Benjamin Harrison was born on 18 Oct 1812 in Leeds; died on 16 Jun 1890 in Knottingley; was buried in Knottingley Churchyard.
8. Joseph Henry Firth was born in 1861 in Knottingley; died about Feb 1884 in Pontefract.
9. Alice Firth was born in 1863 in Knottingley.
10. Jane Harrison was born on 28 Mar 1816 in Knowsthorpe, Leeds.
11. Emily Firth was born in 1866 in Knottingley; died before 1939.
12. Sarah Ann Firth was born in 1869 in Knottingley.