MM
Margaret Mcnamara — 1940 US Census Record
Model Tree available1940 United States Federal Census · Buchanan-County, Iowa
Our Model Tree links this Margaret Mcnamara across the 1920, 1930 and 1940 US Censuses in Buchanan-County, Iowa (XGBoost, ~Confirmed), with identified parents Michael & Michael — first a spouse (b.~1913), then head of a 4-person household.
Age 27
b. ~1913
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Buchanan-County, Iowa |
| Surname | McNamara |
| Given Name | Margaret |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Homer twp |
| 1935 Residence (County) | Buchanan |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Homer Twp |
| Est. Birth Year | ~1913 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mcnamara | Spouse | — | 27 | ~1913 |
| Jane Mcnamara | Daughter | — | 2 | ~1938 |
| William Mcnamara | Head | — | 28 | ~1912 |
| Jerry Mcnamara | Son | — | 5 | ~1935 |
Census Appearances
1920
Buchanan, Iowa
Daughter, age 6
Buchanan, Iowa · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | Marguerite |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Buchanan, Iowa
Daughter, age 17
Buchanan, Iowa · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNamara |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Buchanan-County, Iowa
Spouse, age 27
Buchanan-County, Iowa · implied b. ~1913 — 4 household members
| Surname | McNamara |
| Given Name | Margaret |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Homer twp |
| 1935 Residence (County) | Buchanan |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| 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 Margaret Mcnamara across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Michael Mcnamara (~0.92 confidence) and father Michael Mcnamara (~0.92 confidence) and mother Latta Mcnamara (~0.92 confidence) and mother Loretta Mcnamara (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Michael Mcnamara
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Michael Mcnamara
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Latta Mcnamara
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Loretta Mcnamara
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Mcnamara
Spouse · 1940 · age 27 · b. ~1913 · Iowa
★ 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 — Buchanan-County, Iowa
Open full size
1940 US Federal Census — Buchanan-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01142-00736)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edna Kasaar | 57 | wife | — | Iowa |
| 2 | Richard Ball | 15 | lodger | — | Iowa |
| 3 | William Clayton | 69 | Head | Farmer | Iowa |
| 4 | C. L. Clayton | 67 | wife | — | Iowa |
| 5 | Roger Clayton | 44 | son | Farmer | Iowa |
| 6 | Grace Clayton | 60 | sister | — | Iowa |
| 7 | Karl Falcon | 36 | Head | Farmer | Iowa |
| 8 | Nola Falcon | 37 | wife | — | Iowa |
| 9 | Lloyd Falcon | 14 | son | — | Iowa |
| 10 | Lawrence Falcon | 43 | Head | Farmer | Iowa |
| 11 | Lena Falcon | 39 | wife | — | Iowa |
| 12 | Lizzie Falcon | 70 | mother | — | Iowa |
| 13 | Morris Grover | 38 | Head | Farmer | Iowa |
| 14 | Donna Grover | 32 | wife | — | Michigan |
| 15 | Glen Grover | 9 | son | — | Iowa |
| 16 | Linda Grover | 2 | daughter | — | Iowa |
| 17 | Marion Jamieson | 30 | Head | Laborer | Iowa |
| 18 | Bessie Jamieson | 29 | wife | — | Iowa |
| 19 | Wayne Jamieson | 0 | son | — | Iowa |
| 20 | Dorothy Bradley | 73 | Head | — | Wisconsin |
| 21 | Charles Brown | 69 | step brother | — | Wisconsin |
| 22 | Clarence Mock | 34 | lodger | Farmer | Iowa |
| 23 | Edward Mock | 24 | lodger | Laborer | Iowa |
| 24 | Laverne Gieser | 25 | Head | Farmer | Iowa |
| 25 | Mary Gieser | 23 | wife | — | Iowa |
| 26 | Richard Gieser | 2 | son | — | Iowa |
| 27 | Sandra Gieser | 0 | daughter | — | Iowa |
| 28 | Harry Holst | 32 | Head | Laborer | Iowa |
| 29 | Doris Holst | 19 | wife | — | Iowa |
| 30 | Leo Gieser | 48 | Head | Farmer | Iowa |
| 31 | Susie Gieser | 45 | wife | — | Iowa |
| 32 | William Mcnamara | 28 | Head | Farmer | Iowa |
| 33 | Margaret Mcnamara THIS PERSON | 27 | wife | — | Iowa |
| 34 | Jerry Mcnamara | 5 | son | — | Iowa |
| 35 | Jane Ann Mcnamara | 2 | daughter | — | Iowa |
| 36 | Charles Combs | 40 | Head | Farmer | Iowa |
| 37 | Edna Combs | 30 | wife | — | Iowa |
| 38 | Nick Combs | 70 | uncle | Farmer | Michigan |
| 39 | George Osborne | 62 | Head | Farmer | Iowa |
| 40 | Ora J. Osborne | 58 | wife | — | Oklahoma |
Pedigree Summary
Margaret
Gen 1 · 4 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)