| Notes |
- 1880 Census, Doddridge Co, WV (West Union District), enumerated on Jun 23 1880:
J. J. Costelow, 32, saw mill worker, unable to read or write; wife M., 27, unable to read or write; dau Arminda, 12, unable to read or write; son Sanford, 7; dau Henrietta, 5; dau Lavina, 3; son J. M., 11 months.
1910 Census, Doddridge Co, WV (Town of West Union), enumerated on Apr 21 1910:
Jackson Costelow, 64, laborer, married 30 yrs (1st marriage); wife Mary, 60, married 30 yrs (1st marriage), mother of 11 children (7 still living); son Richard, 22; son Joseph, 20; son Bruce, 19; son LaFeyette, 15. [4, 5]
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| Children |
| | 1. Arminda COSTILOW, b. CA 1868, d. Bef Jun 1915 (Age ~ 47 years) |
| | 2. Sanford COSTILOW, b. CA 1873 |
| | 3. Henrietta COSTILOW, b. CA 1874, Doddridge Co, WV , d. 20 Feb 1900, Doe Run (West Union), Doddridge Co, WV (Age ~ 26 years) |
| | 4. Lavina COSTILOW, b. CA 1877, d. Bef Jun 1915 (Age ~ 38 years) |
| | 5. Joseph M. COSTILOW, b. 1879 |
| + | 6. Mary Elizabeth "Lizzie" COSTILOW, b. CA 1885 |
| | 7. Richard Chapman COSTILOW, b. 2 Apr 1887, Doddridge Co, WV , d. 13 Feb 1960, Akron, Summit Co, OH (Age 72 years) |
| | 8. James COSTILOW, b. CA 1888, d. 4 Oct 1933 (Age ~ 45 years) |
| | 9. Bruce COSTILOW, b. CA 1891 |
| | 10. Lafayette "Lafe" COSTILOW, b. CA 1895, Ritchie Co, WV  |
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