JM
John Monroe — 1940 US Census Record
Model Tree available1940 United States Federal Census · Yolo-County, California
Our Model Tree links this John Monroe across the 1920, 1930 and 1940 US Censuses in Yolo-County, California (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Yolo-County, California |
| Surname | Monroe |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Woodland |
| 1935 Residence (County) | Yolo |
| Additional Details | |
| Occupation | Farm Laborer |
| Industry | Own Farm |
| Class of Worker | NP |
| Hours Worked | 15 |
| Income (1939) | 388 |
| Highest Grade | C 3 |
| 1935 Residence | Same House |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Farm Laborer |
| Township / Ward | Woodland |
| Est. Birth Year | ~1917 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Wyatt Monroe | Son | — | 28 | ~1912 |
| Elvira Monroe | Head | — | 56 | ~1884 |
| Tom Monroe | Son | — | 21 | ~1919 |
| Letitia Monroe | Daughter | — | 25 | ~1915 |
| John Monroe | Son | — | 23 | ~1917 |
Census Appearances
1920
Yolo, California
Son, age 3
Yolo, California · implied b. ~1917 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monroe |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Yolo, California
Son, age 13
Yolo, California · implied b. ~1917 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Munroe |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Yolo-County, California
Son, age 23
Yolo-County, California · implied b. ~1917 — 5 household members
| Surname | Monroe |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Woodland |
| 1935 Residence (County) | Yolo |
| Occupation | Farm Laborer |
| Industry | Own Farm |
| Class of Worker | NP |
| Hours Worked | 15 |
| Income (1939) | 388 |
| Highest Grade | C 3 |
| 1935 Residence | Same House |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Monroe across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Monroe (~0.92 confidence) and father James Munroe (~0.92 confidence) and mother Elvira Monroe (~0.92 confidence) and mother Elvira Monroe (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Monroe
b. ~1869
Source father
● Household
· direct · ~0.92
Father
James Munroe
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Elvira Monroe
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Elvira Monroe
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Monroe
Son · 1940 · age 23 · b. ~1917 · California
★ You are viewing this record
Sibling
Wyatt Monroe
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Letitia Monroe
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Tom Monroe
Sibling · 1940 · age 21
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 — Yolo-County, California
Open full size
1940 US Federal Census — Yolo-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00366-00689)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Stella Hosknett | 34 | Servant | Housekeeper | Iowa |
| 2 | Pallas Neal Ashley | 75 | Head | Farmer | Tennessee |
| 3 | Mamie Ashley | 68 | Wife | — | California |
| 4 | Elvira Monroe | 56 | Head | — | California |
| 5 | Wyatt Monroe | 28 | Son | Surveyor | California |
| 6 | Letitia Monroe | 25 | Daughter | Social Service Worker | California |
| 7 | John Monroe THIS PERSON | 23 | Son | Farm Laborer | California |
| 8 | Tom Monroe | 21 | Son | — | California |
| 9 | Anna Gaddis | 59 | Head | — | California |
| 10 | Dorothy Sakyada | 55 | Servant | Kitchen Helper | California |
| 11 | Frank T. Wolffram | 70 | Head | — | California |
| 12 | Margaret Wolffram | 54 | Wife | — | California |
| 13 | Paul F. Hildebrand | 53 | Head | Auto Electrician | Michigan |
| 14 | Bertha Hildebrand | 37 | Wife | — | Germany |
| 15 | Frank Hildebrand | 14 | Son | — | California |
| 16 | Shirley Hildebrand | 12 | Son | — | California |
| 17 | Arthur C. Nuston | 68 | Head | Attorney | California |
| 18 | Elizabeth Nuston | 67 | Wife | — | California |
| 19 | Fong Bon Lee | 64 | Servant | Houseboy | China |
| 20 | John Dickson Stephens | 49 | Head | Manager | California |
| 21 | Margaret Stephens | 41 | Wife | — | California |
| 22 | John D. Jr. Stephens | 14 | Son | — | California |
| 23 | Jean Stephens | 8 | Daughter | — | California |
| 24 | Isabel Ropes | 18 | Servant | Housemaid | California |
| 25 | Charles A. Orengo | 59 | Head | Warehouse Manager | California |
| 26 | Pearl Orengo | 58 | Wife | — | California |
| 27 | William T. Dahler | 29 | Head | Shop Foreman | California |
| 28 | Elsie Dahler | 40 | Wife | — | California |
| 29 | William Iii Dahler | 12 | Son | — | California |
| 30 | Mary Louise Dahler | 10 | Daughter | — | California |
| 31 | Dorothy Ann Dahler | 6 | Daughter | — | California |
| 32 | John Dahler | 4 | Son | — | California |
| 33 | Fred A. Snively | 66 | Head | Caretaker | Maryland |
| 34 | Emma A. Snively | 62 | Wife | — | California |
| 35 | Samuel F. Fahringer | 59 | Head | Janitor | Pennsylvania |
| 36 | Agnes Fahringer | 56 | Wife | — | California |
| 37 | Millard Cunningham | 37 | Head | Salesman | Nebraska |
| 38 | Esther Cunningham | 32 | Wife | Stenog | Nebraska |
| 39 | Jack C. Doty | 46 | Head | Bartender | California |
| 40 | Lulu Doty | 48 | Wife | — | California |
Related Census Records
Pedigree Summary
John + 3 siblings
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)