MP
Mary Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Arapahoe-County, Colorado
Our Model Tree links this Mary Peterson across the 1920, 1930 and 1940 US Censuses in Arapahoe-County, Colorado (XGBoost, ~Confirmed), with identified parents Edna — first a spouse (b.~1891), then head of a 6-person household.
Age 49
b. ~1891
Female
Spouse
Born: Colorado
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Arapahoe-County, Colorado |
| Surname | Peterson |
| Given Name | Mary H. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Woodlawn |
| 1935 Residence (County) | Arapahoe |
| Additional Details | |
| Occupation | Carpenter |
| Industry | Rough Finishing |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 306 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Carpenter |
| Township / Ward | Woodlawn |
| Est. Birth Year | ~1891 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Eidsvig | Daughter | — | 12 | ~1928 |
| Margaret Eidsvig | Daughter | — | 18 | ~1922 |
| Herbert Peterson | Head | — | 57 | ~1883 |
| Edda Hendrick | Other | — | 81 | ~1859 |
| Hallow Peterson | Son | — | 22 | ~1918 |
| Mary Peterson | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Arapahoe, Colorado
Daughter, age 27
Arapahoe, Colorado · implied b. ~1893 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Mary H |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Colorado |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Arapahoe, Colorado
Other, age 39
Arapahoe, Colorado · implied b. ~1891 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Mary E. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Colorado |
| Age at First Marriage | 26 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Arapahoe-County, Colorado
Spouse, age 49
Arapahoe-County, Colorado · implied b. ~1891 — 6 household members
| Surname | Peterson |
| Given Name | Mary H. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Woodlawn |
| 1935 Residence (County) | Arapahoe |
| Occupation | Carpenter |
| Industry | Rough Finishing |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 306 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Edna Hardwick (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Edna Hardwick
b. ~1859
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Peterson
Spouse · 1940 · age 49 · b. ~1891 · Colorado
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Arapahoe-County, Colorado
Open full size
1940 US Federal Census — Arapahoe-County, Colorado
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-00455-00686)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Vaughn | 13 | Son | — | Kansas |
| 42 | John Paul Vaughn | 12 | Son | — | Oregon |
| 43 | Levi J. Musick | 37 | Head | Machine | Arkansas |
| 44 | Eva G. Musick | 28 | Wife | — | Oklahoma |
| 45 | Timothy S. Hatch | 67 | Head | — | Iowa |
| 46 | Susan L. Hatch | 54 | Wife | — | Ohio |
| 47 | Ralph L. Hatch | 19 | Son | Washman | Nebraska |
| 48 | George S. Mccreary | 54 | Head | Attendant | New York |
| 49 | Dorothy G. Mccreary | 29 | Daughter | Letter Carrier | New York |
| 50 | Irma E. Mccreary | 27 | Daughter | Teacher | New York |
| 51 | Elizabeth French | 63 | Head | Bookkeeper | Kentucky |
| 52 | Arthur M. French | 31 | Son | — | Kentucky |
| 53 | Herbert R. Peterson | 57 | Head | — | Kansas |
| 54 | Mary H. Peterson THIS PERSON | 49 | Wife | Carpenter | Colorado |
| 55 | Hallow Peterson | 22 | Son | County Assistant | Colorado |
| 56 | Margaret Eidsvig | 18 | Daughter | Carpenter | Colorado |
| 57 | Mary L. Eidsvig | 12 | Daughter | — | Colorado |
| 58 | Edda P. Hendrick | 81 | Mother | — | Iowa |
| 59 | Asa Lunsford | 23 | Head | Truck Driver | Kentucky |
| 60 | Elva Lunsford | 20 | Wife | — | Missouri |
| 61 | Claire Jean Lunsford | 6 | Daughter | — | Missouri |
| 62 | Williamson Lunsford | 5 | Son | — | Missouri |
| 63 | Van Dodson | 60 | Head | — | Texas |
| 64 | Anna Dodson | 45 | Wife | — | Nebraska |
| 65 | John Miller | 65 | Head | Cook | Minnesota |
| 66 | Josephine Miller | 60 | Wife | — | Utah |
| 67 | Margaret A. Keenan | 43 | Head | — | Minnesota |
| 68 | Paul F. Keenan | 19 | Son | Clerk | Montana |
| 69 | Alfred P. Atchison | 58 | Head | Contractor | Kansas |
| 70 | Ida Mae Atchison | 48 | Wife | — | Kansas |
| 71 | Leland Hahn | 33 | Head | Electrician | Kansas |
| 72 | Jewane Hahn | 32 | Wife | — | Kansas |
| 73 | Allen E. Bradley | 47 | Head | Teacher | Iowa |
| 74 | Hazel W. Bradley | 49 | Wife | — | Vermont |
| 75 | Elizabeth M. Bradley | 18 | Daughter | — | Iowa |
| 76 | William W. Bradley | 17 | Son | Worker In Laundry | Iowa |
| 77 | Whitney A. Bradley | 14 | Son | Drug Store | Iowa |
| 78 | Joan H. Bradley | 12 | Daughter | Delivering Papers | Iowa |
Pedigree Summary
Mary
Gen 1 · 1 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)