JH
John Hendrickson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marquette-County, Michigan
Our Model Tree links this John Hendrickson across the 1920, 1930 and 1940 US Censuses in Marquette-County, Michigan (XGBoost, ~Confirmed) — first a head (b.~1864), then head of a 3-person household.
Age 76
b. ~1864
Male
Head
Born: Finland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marquette-County, Michigan |
| Surname | Hendrickson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 76 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Ishpeming |
| 1935 Residence (County) | Marquette |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
| Township / Ward | Ishpeming |
| Est. Birth Year | ~1864 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Hendrickson | Head | — | 76 | ~1864 |
| Lillian Rythkonen | Daughter | — | 41 | ~1899 |
| Ruth Hendrickson | Daughter | — | 21 | ~1919 |
Census Appearances
1920
Marquette, Michigan
Head, age 55
Marquette, Michigan · implied b. ~1865 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hendrickson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Finland |
| Year of Immigration | 1888 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Miner |
| Industry | Iron mine |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | No |
| Mother Tongue | Finnish |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth Country | Finland |
| Year of Naturalization | 1900 |
| Birthplace (normalized) | finland |
1930
Marquette, Michigan
Head, age 65
Marquette, Michigan · implied b. ~1865 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hendrickson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Finland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1885 |
| Age at First Marriage | 25 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Miner |
| Industry | Iron Ore |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Finnish |
| Home Owned/Rented | O |
| Home Value / Rent | 3000.00 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1940
Marquette-County, Michigan
Head, age 76
Marquette-County, Michigan · implied b. ~1864 — 3 household members
| Surname | Hendrickson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 76 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Ishpeming |
| 1935 Residence (County) | Marquette |
| Naturalization Status | Naturalized |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
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 Hendrickson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Hendrickson
Head · 1940 · age 76 · b. ~1864 · Michigan
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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 — Marquette-County, Michigan
Open full size
1940 US Federal Census — Marquette-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01786-00188)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ida Purtamaki | 46 | Wife | — | Michigan |
| 42 | William Hendrickson | 47 | Head | Maintainer | Michigan |
| 43 | Agnes Hendrickson | 45 | Wife | — | Michigan |
| 44 | John Hendrickson THIS PERSON | 76 | Head | — | Finland |
| 45 | Ruth Hendrickson | 21 | Daughter | Steno, Clerk | Michigan |
| 46 | Lillian Rythkonen | 41 | Daughter | — | Michigan |
| 47 | J. Albert St. Onge | 29 | Head | Ship Tender | Canada |
| 48 | Concetta St. Onge | 23 | Wife | — | Michigan |
| 49 | William St. Onge | 2 | son | — | Michigan |
| 50 | Albert St. Onge | 1 | son | — | Michigan |
| 51 | Joseph Reberdy | 46 | Head | Carpenter | Michigan |
| 52 | Melvinia Reberdy | 47 | Wife | — | Michigan |
| 53 | Joseph Reberdy | 24 | Son | Miner Helper | Michigan |
| 54 | Paul Reberdy | 18 | Son | State Highway Project | Michigan |
| 55 | Dolores Reberdy | 8 | Daughter | — | Michigan |
| 56 | Donald Reberdy | 3 | Son | — | Michigan |
| 57 | Ronald Sihtola | 29 | Head | Truck Driver | Michigan |
| 58 | Julianna Sihtola | 22 | Wife | — | Michigan |
| 59 | Robert Sihtola | 1 | son | — | Michigan |
| 60 | Richard Sihtola | 0 | son | — | Michigan |
| 61 | Vito Roti | 45 | Head | Miner | Italy |
| 62 | Victoria Roti | 40 | Wife | — | Michigan |
| 63 | Mary Roti | 21 | Daughter | Mach Operator | Michigan |
| 64 | Stella Roti | 19 | Daughter | Mach Operator | Michigan |
| 65 | Angela Roti | 18 | Daughter | — | Michigan |
| 66 | Richard Roti | 15 | Son | — | Michigan |
| 67 | Rose Roti | 14 | Daughter | — | Michigan |
| 68 | Frances Roti | 12 | Daughter | — | Michigan |
| 69 | Albert Anderson | 60 | Head | Motor Man | Michigan |
| 70 | Margaret Anderson | 63 | Wife | — | Michigan |
| 71 | Marie Anderson | 27 | Daughter | Clerk | Michigan |
| 72 | Robert Anderson | 22 | son | New Worker | Michigan |
| 73 | Howard Anderson | 19 | son | New Worker | Michigan |
| 74 | Thomas Cooney | 61 | Brother in law | Laborer | Michigan |
| 75 | William Cooney | 57 | Brother in law | — | Michigan |
| 76 | Mary Cooney | 49 | Sister in law | — | Michigan |
| 77 | Arvid Kulju | 48 | Head | Miner | Finland |
| 78 | Anna Kulju | 54 | Wife | — | Finland |
| 79 | John Kulju | 21 | Son | Miner Helper | Michigan |
| 80 | Paul Kulju | 19 | Son | New Worker | Michigan |
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)