MC
Mary Cox — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Marion, Indiana
Our Model Tree links this Mary Cox across the 1910, 1920 and 1930 US Censuses in Marion, Indiana (XGBoost, ~Confirmed) — first a spouse (b.~1890), then head of a 7-person household.
Age 40
b. ~1890
Female
Spouse
Born: Ohio
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Marion, Indiana |
| Surname | Cox |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 18 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Indianapolis City |
| Est. Birth Year | ~1890 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Ruth Cox | Daughter | — | 18 | ~1912 |
| Evelyn Cox | Daughter | — | 16 | ~1914 |
| Edward Cox | Head | — | 51 | ~1879 |
| John Cox | Son | — | 20 | ~1910 |
| Charles Cox | Son | — | 6 | ~1924 |
| Donald Cox | Son | — | 15 | ~1915 |
| Mary Cox | Spouse | — | 40 | ~1890 |
Census Appearances
1910
Marion, Indiana
Spouse, age 21
Marion, Indiana · implied b. ~1889 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Ohio |
| Years Married | 3 |
| Children Born | 2 |
| Children Living | 2 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1920
Marion, Indiana
Spouse, age 31
Marion, Indiana · implied b. ~1889 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Marion, Indiana
Spouse, age 40
Marion, Indiana · implied b. ~1890 — 7 household members
| Surname | Cox |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 18 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Mary Cox across 3 US Census years (1910, 1920 and 1930) in Marion, Indiana, using XGBoost record linkage.
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This person
Anchor record
Mary Cox
Spouse · 1930 · age 40 · b. ~1890 · Indiana
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Marion, Indiana
Open full size
1930 US Federal Census — Marion, Indiana
Page Contents
50 people indexed on this census page (ia:1930:indianacensus00reel612rs:0691)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Fred L. Carl | 64 | Head | Repairman | Iowa |
| 2 | Gertrude E. Carl | 53 | Wife | — | Indiana |
| 3 | John C. Carl | 15 | Son | — | Indiana |
| 4 | Gertrude A. Miller | 50 | Head | — | Indiana |
| 5 | Francis A. Miller | 25 | Son | Salesman | Indiana |
| 6 | Harold E. Miller | 14 | Son | — | Indiana |
| 7 | Henry H. Luedeman | 53 | Head | Proprietor | Indiana |
| 8 | Matilda K. Luedeman | 49 | Wife | — | Indiana |
| 9 | Mildred I. Luedeman | 17 | Daughter | Stenographer | Indiana |
| 10 | Paul F. Luedeman | 13 | Son | — | Indiana |
| 11 | Edward Cox | 51 | Head | Janitor | Ohio |
| 12 | Mary E. Cox THIS PERSON | 40 | Wife | — | Ohio |
| 13 | John E. Cox | 20 | Son | Dismantling | Indiana |
| 14 | Ruth E. Cox | 18 | Daughter | Stenographer | Indiana |
| 15 | Evelyn N. Cox | 16 | Daughter | — | Indiana |
| 16 | Donald Earl Cox | 15 | Son | — | Indiana |
| 17 | Charles F. Cox | 6 | Son | — | Indiana |
| 18 | Elsie May Florey | 42 | Head | Saleslady | Indiana |
| 19 | Homer Florey | 22 | Son | Salesman | Indiana |
| 20 | Arthur Florey | 19 | Son | Salesman | Indiana |
| 21 | Mildred Florey | 17 | Daughter | Stenographer | Indiana |
| 22 | Walter Florey | 15 | Son | Salesman | Indiana |
| 23 | Sam T. Holloway | 30 | Head | Cleaning & Pressing | Indiana |
| 24 | Sonia Holloway | 25 | Wife | — | Indiana |
| 25 | Luther S. Wade | 24 | Head | Salesman | Kentucky |
| 26 | Geneva I. Wade | 23 | Wife | — | Indiana |
| 27 | Gertrude S. Wade | 0 | Son | — | Indiana |
| 28 | Earl H. Cauthron | 33 | Head | Metal Lather | Indiana |
| 29 | Leona S. Cauthron | 28 | Wife | — | Indiana |
| 30 | Earl Jr. Cauthron | 8 | Son | — | Indiana |
| 31 | Martha J. Cauthron | 3 | Daughter | — | Indiana |
| 32 | Rolla C. Mathews | 43 | Head | Unit Manager | Ohio |
| 33 | Camille Mathews | 43 | Wife | — | Missouri |
| 34 | Voltaina J. Mathews | 14 | Daughter | — | Missouri |
| 35 | Roy E. Boatwright | 42 | Head | Contractor | Illinois |
| 36 | Bessie M. Boatwright | 41 | Wife | — | Maryland |
| 37 | Frank K. Boatwright | 17 | Son | — | Illinois |
| 38 | Harry Boatwright | 22 | Brother | Stock Clerk | Illinois |
| 39 | Elva Boatwright | 24 | Sister-in-law | Stenographer | Illinois |
| 40 | Harold W. Britts | 43 | Head | Machinist | Indiana |
| 41 | Emma B. Britts | 40 | Wife | — | Indiana |
| 42 | Earl C. Britts | 13 | Son | — | Indiana |
| 43 | Carl H. Britts | 17 | Son | Apprentice | Indiana |
| 44 | Ethel S. Britts | 15 | Daughter | — | Indiana |
| 45 | Joseph C. Britts | 14 | Son | — | Indiana |
| 46 | Bertha Lou Britts | 6 | Daughter | — | Indiana |
| 47 | Jess A. Eldridge | 41 | Head | Manager | Indiana |
| 48 | Theresa Eldridge | 40 | Wife | Cashier | Indiana |
| 49 | Eleanor M. Eldridge | 17 | Daughter | — | Indiana |
| 50 | Herman C. Myers | 32 | Head | Manager | Indiana |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)