| PERSON | PARENTS | GRANDPARENTS | GREAT-GRANDPARENTS | GREAT-GREAT-GRANDPARENTS |
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| | | | 4 Charles Hudson Obday (4 October 1878 - ) | | |
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| | | 2 Charles Hudson Obday, Jr. (11 July 1920 - November 1954) | | | |
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| | | | | 5 May _____ (ca. 1884 - ) | | |
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| 1 Robert Roy Obday (23 October 1948 - ) | | | | | | | | |
| | | | | | 12 Harry Nelson ( - ) | |
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| | | | | 6 Roy Nelson (26 June 1894 - 6 June 1948) | | |
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| | | | | | | 13 Mary Tobias ( - ) | |
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| | | 3 Harrietta Mary ‘Harriet’ Nelson (13 January 1924 - 27 October 1986) | | | |
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| | | | | | 14 _____ Douglass ( - ) | |
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| | | | 7 Clarissa ‘Clara’ Clark (born Douglass) (12 November 1897 - 17 May 1972) | | |
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| | | | | | | 30 Harris T. Chapel (30 August 1819 - 17 May 1901) | > |
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| | | | | 15 Elizabeth Chapel (18 August 1877 - 8 February 1967) | |
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| | | | | | 31 Margaret Adamson (30 March 1850 - 27 October 1946) | > |
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Ancestors of Robert Roy Obday