MC
Mary Cameron — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Black-Hawk-County, Iowa
Our Model Tree links this Mary Cameron across the 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1898), then head of a 7-person household.
Age 42
b. ~1898
Female
Daughter
Born: Iowa
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Black-Hawk-County, Iowa |
| Surname | Cameron |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Waterloo City |
| 1935 Residence (County) | Black Hawk |
| Additional Details | |
| Occupation | W.P.A. |
| Highest Grade | 8 |
| 1935 Residence | Same town |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | W.P.A. |
| Township / Ward | Waterloo City |
| Est. Birth Year | ~1898 |
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 |
|---|---|---|---|---|
| Glenn Cameron | Son | — | 20 | ~1920 |
| Marion Cameron | Daughter | — | 8 | ~1932 |
| Nellie Beber | Spouse | — | 76 | ~1864 |
| Margaret Cameron | Daughter | — | 16 | ~1924 |
| Frank Beber | Head | — | 18 | ~1922 |
| Mary Cameron | Daughter | — | 42 | ~1898 |
| Leonard Cameron | Son | — | 14 | ~1926 |
Census Appearances
1930
Black Hawk, …
Other, age 31
Black Hawk, Iowa · implied b. ~1899 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cameron |
| Given Name | Mary A. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 20 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Black-Hawk-County, Iowa
Daughter, age 42
Black-Hawk-County, Iowa · implied b. ~1898 — 7 household members
| Surname | Cameron |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Waterloo City |
| 1935 Residence (County) | Black Hawk |
| Occupation | W.P.A. |
| Highest Grade | 8 |
| 1935 Residence | Same town |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Cameron across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cameron
Daughter · 1940 · age 42 · b. ~1898 · Iowa
★ You are viewing this record
Sibling
Marion Cameron
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Cameron
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Glenn Cameron
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard Cameron
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 — Black-Hawk-County, Iowa
Open full size
1940 US Federal Census — Black-Hawk-County, Iowa
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-01140-01390)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Victor Morkel | 30 | Head | Laborer | Germany |
| 42 | Vernette Morkel | 29 | Wife | Laborer | Iowa |
| 43 | Jack Morkel | 5 | Son | — | Iowa |
| 44 | Janet Morkel | 3 | Daughter | — | Iowa |
| 45 | John R. Malley | 25 | Head | Presser | Iowa |
| 46 | Edna S. Malley | 26 | Wife | Housewife | Iowa |
| 47 | Donnie M. Malley | 4 | Daughter | — | Iowa |
| 48 | Ralph W. Green | 26 | Head | Laborer | Iowa |
| 49 | Cecilia K. Green | 22 | Wife | Laborer | Iowa |
| 50 | David Lee Green | 3 | Son | — | Iowa |
| 51 | Nilla D. Harvey | 35 | Head | Laborer | Iowa |
| 52 | Blanche Harvey | 35 | Wife | — | Iowa |
| 53 | Robert Harvey | 13 | Son | — | Iowa |
| 54 | Merla Harvey | 4 | Son | — | Iowa |
| 55 | Harry H. Nitchals | 62 | Head | Rock Quarry | Missouri |
| 56 | Bertha Nitchals | 56 | Wife | — | Iowa |
| 57 | Frank J. Beber | 18 | Head | Son Killed In W. War #25 | Illinois |
| 58 | Nellie Beber | 76 | Wife | """ "" "" "" #25" | Iowa |
| 59 | Mary Cameron THIS PERSON | 42 | Daughter | W.P.A. | Iowa |
| 60 | Glenn Cameron | 20 | Son | — | Iowa |
| 61 | Margaret Cameron | 16 | Daughter | — | Iowa |
| 62 | Leonard Cameron | 14 | Son | — | Iowa |
| 63 | Marion Cameron | 8 | Daughter | — | Iowa |
| 64 | Renz L. Adler | 40 | Head | Laborer | Iowa |
| 65 | Lela Adler | 39 | Wife | — | Wisconsin |
| 66 | Lawrence Adler | 23 | Son | Laborer | Iowa |
| 67 | Ruby Adler | 15 | Daughter | — | Iowa |
| 68 | Beula Adler | 14 | Daughter | — | Iowa |
| 69 | Charles F. Vanoman | 48 | Head | Laborer | Iowa |
| 70 | Marie Vanoman | 42 | Wife | — | Iowa |
| 71 | Donald Vanoman | 20 | Son | Mechanic | Iowa |
| 72 | Kenneth Vanoman | 18 | Son | Laborer | Iowa |
| 73 | Paul J. Nuss | 44 | Head | Carpenter | Iowa |
| 74 | Helen Nuss | 42 | Wife | — | Iowa |
| 75 | Lucille Nuss | 13 | Daughter | — | Iowa |
| 76 | Eldon Nuss | 7 | Son | — | Iowa |
| 77 | S. Elston Van Winkle | 30 | Head | Truck Driver | Iowa |
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)