| PERSON | PARENTS | GRANDPARENTS | GREAT-GRANDPARENTS | GREAT-GREAT-GRANDPARENTS |
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| | | | 4 Manuel Costello ( - ) | | |
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| | | 2 Gilbert Manuel Costello (14 July 1911 - 15 February 1955) | | | |
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| | | | | 5 Mary Sousa ( - ) | | |
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| 1 Lois Dorothy Costello (24 May 1934 - ) | | | | | | | | |
| | | | | | | 24 John H. Tefft (November 1844 - 2 June 1916) | > |
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| | | | | | 12 Elmer James Tefft, Sr. (12 April 1867 - 27 April 1935) | |
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| | | | | | | | 25 Ellen O. Boyens (December 1839 - 15 January 1936) | > |
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| | | | | 6 Luther Clinton Tefft (28 August 1891 - 28 July 1949) | | |
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| | | | | | | | | 26 Robert McClure (ca. 1841 - ) |
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| | | | | | | 13 Jessie Louise McClure (August 1866 - 28 November 1950) | |
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| | | | | | | | 27 Janet _____ (ca. 1843 - ) |
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| | | 3 Dorothy Tefft (7 February 1912 - 15 July 1997) | | | |
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| | | | | | 14 James LaFlamme ( - ) | |
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| | | | 7 Mabel LaFlamme (11 February 1892 - 7 September 1958) | | |
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| | | | | 15 Mabel Grace Windsor (1 July 1878 - 6 January 1941) | |
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Ancestors of Lois Dorothy Costello