JH
James Hoffman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Linn-County, Iowa
Our Model Tree links this James Hoffman across the 1930 and 1940 US Censuses in Linn-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 8-person household.
Age 10
b. ~1930
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Linn-County, Iowa |
| Surname | Hoffman |
| Given Name | James E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Rapids City |
| 1935 Residence (County) | Linn |
| Additional Details | |
| Highest Grade | S-4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Cedar Rapids City |
| Est. Birth Year | ~1930 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| John Hoffman | Head | — | 41 | ~1899 |
| Theresa Hoffman | Spouse | — | 37 | ~1903 |
| Barbara Hoffman | Daughter | — | 4 | ~1936 |
| Ann Hoffman | Daughter | — | 13 | ~1927 |
| Thomas Hoffman | Son | — | 8 | ~1932 |
| Donald Hoffman | Son | — | ~1940 | |
| John Hoffman | Son | — | 14 | ~1926 |
| James Hoffman | Son | — | 10 | ~1930 |
Census Appearances
1930
Linn, Iowa
Son, age 1
Linn, Iowa · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hoffman |
| Given Name | James E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Linn-County, Iowa
Son, age 10
Linn-County, Iowa · implied b. ~1930 — 8 household members
| Surname | Hoffman |
| Given Name | James E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Rapids City |
| 1935 Residence (County) | Linn |
| Highest Grade | S-4 |
| 1935 Residence | Same place |
| 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 James Hoffman across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Hoffman
Son · 1940 · age 10 · b. ~1930 · Iowa
★ You are viewing this record
Sibling
Ann Hoffman
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Hoffman
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Hoffman
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Hoffman
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Hoffman
Sibling · 1940 · age 8
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 — Linn-County, Iowa
Open full size
1940 US Federal Census — Linn-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01177-00307)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John B. Hoffman | 41 | Head | Laborer | Iowa |
| 2 | Theresa A. Hoffman | 37 | Wife | — | Iowa |
| 3 | John J. Hoffman | 14 | Son | Newsboy | Iowa |
| 4 | Ann K. Hoffman | 13 | Daughter | Laborer | Iowa |
| 5 | James E. Hoffman THIS PERSON | 10 | Son | — | Iowa |
| 6 | Thomas F. Hoffman | 8 | Son | — | Iowa |
| 7 | Barbara A. Hoffman | 4 | Daughter | — | Iowa |
| 8 | Donald P. Hoffman | 0 | Son | — | Iowa |
| 9 | J. C. Murphy | 65 | Head | Laborer | Iowa |
| 10 | Ida Murphy | 61 | Wife | — | Iowa |
| 11 | Mary White | 37 | Daughter | Stenographer | Iowa |
| 12 | Francis Murphy | 70 | Sister | — | Iowa |
| 13 | Joseph H. Sherrick | 63 | Head | Mechanic | Iowa |
| 14 | Elizabeth M. Sherrick | 60 | Wife | — | Iowa |
| 15 | L. G. Turner | 43 | Head | Clerk | Ohio |
| 16 | Vina Turner | 39 | Wife | Nurse | Iowa |
| 17 | John L. Turner | 9 | Son | — | Iowa |
| 18 | Jane Turner | 6 | Daughter | — | Iowa |
| 19 | Margaret Turner | 72 | Mother | — | Iowa |
| 20 | Elsie Burge | 62 | Mother-in-law | Housekeeper | Iowa |
| 21 | Terrence E. Margaret | 55 | Head | Night Watch | Iowa |
| 22 | Isabel G. Margaret | 53 | Wife | — | Iowa |
| 23 | Harry C. Cooper | 44 | Head | Shipping Clerk | Nebraska |
| 24 | Sadie M. Cooper | 36 | Wife | — | Iowa |
| 25 | Kenneth Cooper | 14 | Son | — | Iowa |
| 26 | Ann Cooper | 74 | Mother | — | Illinois |
| 27 | C. B. Kent | 78 | Brother | — | Penn |
| 28 | Laura E. Rutan | 71 | Head | — | Penn |
| 29 | Wm Heaver | 29 | Head | Baker | Kansas |
| 30 | Dolores A. Heaver | 22 | Wife | Cashier | Iowa |
| 31 | Ann Morgan | 61 | Head | — | Iowa |
| 32 | Joseph H. Morgan | 23 | Son | Clerk | Iowa |
| 33 | Imelda Morgan | 21 | Daughter | Telephone Opr. | Iowa |
| 34 | Glen Morgan | 18 | Son | At Work | Iowa |
| 35 | Joseph P. Murray | 68 | Brother | Salesman | Iowa |
| 36 | Linna Guido | 75 | Head | — | Iowa |
| 37 | Wm T. Guido | 42 | Son | Salesman | Iowa |
| 38 | A. G. Palumbo | 47 | Head | Merchant | Italy |
| 39 | Mary Palumbo | 45 | Wife | — | Illinois |
| 40 | Josephine Palumbo | 18 | Daughter | — | 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)