| PERSON | PARENTS | GRANDPARENTS | GREAT-GRANDPARENTS | GREAT-GREAT-GRANDPARENTS |
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| | | 2 Milo Murl Gassoway (1917 - 1990) | | | |
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| 1 John Howard Gassoway (9 December 1946 - 29 November 1994) | | | | | | | | |
| | | | | | | 24 Henry Rogers Ryan (1 August 1818 - 20 November 1898) | > |
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| | | | | | 12 George Harry Ryan (31 July 1848 - 23 November 1934) | |
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| | | | | | | | 25 Abigail ‘Abbey’ Gazlay (10 March 1828 - 27 February 1920) | > |
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| | | | | 6 Warren Wood Ryan (20 December 1886 - 4 March 1949) | | |
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| | | | | | | | | 26 David Lewis Wood ( - ) |
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| | | | | | | 13 Lucy Viola Wood (11 October 1849 - 29 October 1925) | |
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| | | | | | | | 27 Lucy V. Church ( - ) |
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| | | 3 Gladys Lucille Ryan (June 1918 - 2006) | | | |
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| | | | | | | 28 William F. Coryell (19 April 1828 - 12 June 1891) | > |
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| | | | | | 14 Walter Burke Coryell (12 August 1851 - 1 May 1928) | |
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| | | | | | | | 29 Mary Ann Slocum (15 September 1827 - 22 February 1910) |
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| | | | 7 Muriel Coryell (March 1893 - 1967) | | |
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| | | | | | | 30 M. B. Walsh ( - ) |
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| | | | | 15 Rosa Belle Walsh (17 May 1866 - 11 April 1936) | |
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| | | | | | 31 Sarah Long ( - ) |
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Ancestors of John Howard Gassoway