JB
John Briggs — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Buchanan-County, Iowa
Our Model Tree links this John Briggs across the 1930 and 1940 US Censuses in Buchanan-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 6-person household.
Age 47
b. ~1893
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Buchanan-County, Iowa |
| Surname | Briggs |
| Given Name | John L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Buchanan |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Byron Twp |
| Est. Birth Year | ~1893 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Bonita Briggs | Daughter | — | 17 | ~1923 |
| John Briggs | Head | — | 47 | ~1893 |
| John Briggs | Son | — | 16 | ~1924 |
| Joan Briggs | Daughter | — | 13 | ~1927 |
| Allen Briggs | Son | — | 11 | ~1929 |
| Grace Briggs | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Buchanan, Iowa
Head, age 36
Buchanan, Iowa · implied b. ~1894 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brigg |
| Given Name | John L |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 26 |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Iowa |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 2500 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Buchanan-County, Iowa
Head, age 47
Buchanan-County, Iowa · implied b. ~1893 — 6 household members
| Surname | Briggs |
| Given Name | John L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Buchanan |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Iowa |
| 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 John Briggs across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Briggs
Head · 1940 · age 47 · b. ~1893 · Iowa
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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-t0627-01142-00596)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John H. Martin | 4 | Son | — | Iowa |
| 2 | George W. Hayden | 59 | Lodger | Laborer | England |
| 3 | William A. Ludloff | 75 | Head | Farmer | Iowa |
| 4 | Mary E. Ludloff | 60 | Wife | — | Iowa |
| 5 | Raymond R. Ludloff | 29 | Son | Laborer | Iowa |
| 6 | Harry A. Ludloff | 25 | Son | Laborer | Iowa |
| 7 | Bessie A. Briggs | 26 | Daughter | — | Iowa |
| 8 | Ervin L. Briggs | 27 | Son-in-law | Laborer | Iowa |
| 9 | Cliff S. Mayer | 55 | Head | Farmer | Iowa |
| 10 | Nellie D. Mayer | 58 | Wife | — | Iowa |
| 11 | Otto H. Johnson | 59 | Head | Farmer | Iowa |
| 12 | Sophia Johnson | 61 | Wife | — | Missouri |
| 13 | Kenneth P. Johnson | 25 | Son | Laborer | Iowa |
| 14 | Merlin L. Hockens | 21 | Head | Laborer | Iowa |
| 15 | Raythris A. Hockens | 23 | Wife | — | Iowa |
| 16 | Leroy V. Hockens | 0 | Son | — | Iowa |
| 17 | Mike Rochford | 56 | Head | Farmer | Iowa |
| 18 | Clara N. Rochford | 48 | Wife | — | Iowa |
| 19 | Eileen M. Rochford | 10 | Daughter | — | Iowa |
| 20 | Benedict J. Rochford | 5 | Son | — | Iowa |
| 21 | Howard J. Arnold | 25 | Head | Farmer | Iowa |
| 22 | Marion E. Arnold | 24 | Wife | — | Iowa |
| 23 | John L. Briggs THIS PERSON | 47 | Head | Farmer | Iowa |
| 24 | Grace A. Briggs | 40 | Wife | — | Iowa |
| 25 | Bonita L. Briggs | 17 | Daughter | — | Iowa |
| 26 | John R. Briggs | 16 | Son | — | Iowa |
| 27 | Joan E. Briggs | 13 | Daughter | — | Iowa |
| 28 | Allen L. Briggs | 11 | Son | — | Iowa |
| 29 | Fred H. Foote | 72 | Head | Farmer | Iowa |
| 30 | Anna M. Foote | 73 | Wife | — | Iowa |
| 31 | James R. Finck | 24 | Head | Laborer | Iowa |
| 32 | Clarice C. Finck | 19 | Wife | — | Iowa |
| 33 | Glenn B. Finck | 1 | Son | — | Iowa |
| 34 | Earl H. Schwilger | 49 | Head | — | Iowa |
| 35 | Anna Mae Schwilger | 47 | Wife | — | Canada |
| 36 | Arthur C. Schwilger | 23 | Son | Laborer | Canada |
| 37 | Beatrice E. Schwilger | 21 | Daughter | Teacher | Iowa |
| 38 | Ester M. Schwilger | 19 | Daughter | Teacher | Iowa |
| 39 | Irving I. Loomis | 35 | Head | Farmer | Iowa |
| 40 | Elsie E. Loomis | 27 | Wife | — | Iowa |
Related Census Records
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)