JM
John Maguire — 1940 US Census Record
Model Tree available1940 United States Federal Census · Denver-County, Colorado
Our Model Tree links this John Maguire across the 1920, 1930 and 1940 US Censuses in Denver-County, Colorado (XGBoost, ~Confirmed), with identified parents Patrick & Mary — first a son (b.~1912), then head of a 4-person household.
Age 28
b. ~1912
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Denver-County, Colorado |
| Surname | Maguire |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Denver |
| 1935 Residence (County) | Denver |
| Additional Details | |
| Occupation | Chauffeur |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 0 |
| Income (1939) | 420 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Chauffeur |
| Township / Ward | Denver |
| Est. Birth Year | ~1912 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Mary Maguire | Head | — | 60 | ~1880 |
| John Maguire | Son | — | 28 | ~1912 |
| Marita Maguire | Daughter | — | 24 | ~1916 |
| Alice Maguire | Daughter | — | 18 | ~1922 |
Census Appearances
1920
Denver, Colorado
Son, age 9
Denver, Colorado · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Maguire |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Speaks English | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Denver, Colorado
Son, age 19
Denver, Colorado · implied b. ~1911 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Maguire |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Gardner |
| Industry | Private |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Denver-County, Colorado
Son, age 28
Denver-County, Colorado · implied b. ~1912 — 4 household members
| Surname | Maguire |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Denver |
| 1935 Residence (County) | Denver |
| Occupation | Chauffeur |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 0 |
| Income (1939) | 420 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| 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 John Maguire across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Patrick Maguire (~0.92 confidence) and mother Mary Maguire (~0.92 confidence) and mother Mary Maguire (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Patrick Maguire
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Mary Maguire
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Mary Maguire
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Maguire
Son · 1940 · age 28 · b. ~1912 · Colorado
★ You are viewing this record
Sibling
Marita Maguire
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Maguire
Sibling · 1940 · age 18
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 — Denver-County, Colorado
Open full size
1940 US Federal Census — Denver-County, Colorado
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-00487-00489)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gladys Conradson | 38 | Sister-in-law | Nurse | Montana |
| 42 | Herman G. Fischer | 66 | Head | Salesman | Ohio |
| 43 | Jessie Fischer | 56 | Wife | — | Nebraska |
| 44 | Richard O. Keller | 74 | Head | — | Wisconsin |
| 45 | Thelma S. Keller | 60 | Wife | — | Nebraska |
| 47 | James E. Murphy | 51 | Head | Barber | Kansas |
| 48 | Irene Julie Murphy | 41 | Wife | — | Kansas |
| 51 | Louis W. Roper | 56 | Head | Landscape Gardener | Tennessee |
| 52 | Lillie L. Roper | 49 | Wife | — | Colorado |
| 53 | Louise M. Roper | 18 | Daughter | — | Colorado |
| 54 | Louis C. Roper | 14 | Son | — | Colorado |
| 55 | Benetta Rody | 23 | Head | — | Oregon |
| 56 | Daniel G. Rody | 32 | Husband | Officer Salvation Army | Canada |
| 57 | De Ann Marie Rody | 1 | Daughter | — | Montana |
| 58 | William Peterson | 28 | Head | Mailman | Nebraska |
| 59 | Dorothy Peterson | 24 | Wife | — | Nebraska |
| 60 | Mary A. Maguire | 60 | Head | — | Irish Free State |
| 61 | John Maguire THIS PERSON | 28 | Son | Chauffeur | Colorado |
| 62 | Marita Maguire | 24 | Daughter | Stenographer | Colorado |
| 63 | Alice Maguire | 18 | Daughter | Typist | Colorado |
| 64 | Ernestine Arnold | 72 | Head | — | New York |
| 65 | Arthur H. Lane | 52 | Head | Carpenter | Illinois |
| 66 | Lora M. Lane | 58 | Wife | — | Illinois |
| 67 | Wm E. Burkhert | 75 | Head | Optometrist | Illinois |
| 68 | Jessie H. Burkhert | 73 | Wife | — | Ohio |
| 69 | Chas. C. Corn | 30 | Head | Store Manager | Ohio |
| 70 | Amelia Corn | 26 | Wife | — | Colorado |
| 71 | Jack Corn | 3 | Son | — | Colorado |
| 72 | Clarence Chappell | 34 | Head | Attendant | Colorado |
| 73 | Cloe Chappell | 34 | Wife | — | Colorado |
| 74 | Ruth Chappell | 12 | Daughter | — | Colorado |
| 75 | George Chappell | 2 | Son | — | Colorado |
| 76 | Merle C. Wardell | 30 | Head | Social Scientist | Iowa |
| 77 | Minerva C. Wardell | 66 | Mother | — | Iowa |
| 78 | Wendell C. Wardell | 34 | Brother | — | Iowa |
| 79 | George Calkins | 35 | Head | Clerk | Colorado |
| 80 | Marjorie L. Calkins | 25 | Wife | — | Colorado |
Pedigree Summary
John + 2 siblings
Gen 1 · 3 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)