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Mary Bird — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Montana
Our Model Tree links this Mary Bird across the 1930 and 1940 US Censuses in Lake-County, Montana (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 7-person household.
Age 11
b. ~1929
Female
Daughter
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Montana |
| Surname | Bird |
| Given Name | Mary Rose |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Mission |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same House |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Township / Ward | Mission |
| Est. Birth Year | ~1929 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Annie Bird | Daughter | — | 14 | ~1926 |
| Nancy Bird | Head | — | 42 | ~1898 |
| Eugene Bird | Son | — | 7 | ~1933 |
| Ida Bird | Daughter | — | 16 | ~1924 |
| Charles Bird | Son | — | 25 | ~1915 |
| George Bird | Other | — | 66 | ~1874 |
| Mary Bird | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Lake, Montana
Daughter, age 1
Lake, Montana · implied b. ~1929 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bird |
| Given Name | Mary J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | American Indian |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Mixed blood |
| Mother's Birthplace | Flathead |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Lake-County, Montana
Daughter, age 11
Lake-County, Montana · implied b. ~1929 — 7 household members
| Surname | Bird |
| Given Name | Mary Rose |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Mission |
| 1935 Residence (County) | Lake |
| Highest Grade | No 4 |
| 1935 Residence | Same House |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 Bird across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Bird
Daughter · 1940 · age 11 · b. ~1929 · Montana
★ You are viewing this record
Sibling
Ida Bird
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Bird
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Bird
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Annie Bird
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Lake-County, Montana
Open full size
1940 US Federal Census — Lake-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02222-00221)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Eugene Shepard | 10 | Son | — | Montana |
| 42 | Bernice Shepard | 8 | Daughter | — | Montana |
| 43 | Laura Mae Shepard | 6 | Daughter | — | Montana |
| 44 | Leslie Shepard | 1 | Son | — | Montana |
| 45 | Nancy L. Bird | 42 | Head | Owner Operator | Montana |
| 46 | Charles Bird | 25 | Son | Laborer | Montana |
| 47 | Ida Bird | 16 | Daughter | — | Montana |
| 48 | Annie Bird | 14 | Daughter | — | Montana |
| 49 | Mary Rose Bird THIS PERSON | 11 | Daughter | — | Montana |
| 50 | Eugene Bird | 7 | Son | — | Montana |
| 51 | George Bird | 66 | Bro-in-law | — | Minnesota |
| 52 | Leo Sias | 30 | Head | Laborer | Montana |
| 53 | Mabel Sias | 25 | Wife | — | Montana |
| 54 | James Sias | 10 | Son | — | Montana |
| 55 | Donna Jean Sias | 6 | Daughter | — | Montana |
| 56 | Kenneth Sias | 5 | Son | — | Montana |
| 57 | Viola Mae Sias | 4 | Daughter | — | Montana |
| 58 | Joseph Allard | 63 | Head | Farmer | Montana |
| 59 | Adaline Allard | 59 | Wife | — | Montana |
| 60 | June Yeiter | 31 | Daughter | — | Montana |
| 61 | Mary Joseph Whitcher | 36 | Lodger | — | Montana |
| 62 | Alex Reynolds | 39 | Hired man | Laborer | Missouri |
| 63 | Edna M. Spooner | 42 | Head | Owner | Montana |
| 64 | Jean Spooner | 17 | Daughter | — | Montana |
| 65 | George Cordis | 26 | Lodger | Truck Driver | Nebraska |
| 66 | Ole S. Dhoran | 58 | Head | Farmer | Minnesota |
| 67 | Maude E. Dhoran | 53 | Wife | — | Wisconsin |
| 68 | P. L. Kelly | 58 | Hired man | Laborer | Maine |
| 69 | Theodore Knutson | 38 | Head | Farmer | Minnesota |
| 70 | Edna Knutson | 33 | Wife | — | Montana |
| 71 | Theodore Jr. Knutson | 7 | Son | — | Montana |
| 72 | Jack Knutson | 5 | Son | — | Montana |
| 73 | John A. Hazel | 67 | Head | Farmer | Indiana |
| 74 | Lillian Hazel | 64 | Wife | — | Indiana |
| 75 | Andrew Minesinger | 40 | Hired man | Laborer | Montana |
| 76 | Avery Stevens | 52 | Head | Farmer | W. Virginia |
| 77 | Mabel Stevens | 56 | Wife | — | Idaho |
| 78 | Joyce Harris | 20 | Hired girl | Housemaid | England |
| 79 | Peter Hammeren | 35 | Hired man | Laborer | Norway |
| 80 | J. A. Dowell | 60 | Head | Farmer | Missouri |
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)