JL
John Link — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this John Link across the 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 7-person household.
Age 19
b. ~1921
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Link |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Crocker Twp |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Crocker Twp |
| Est. Birth Year | ~1921 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Viola Link | Spouse | — | 36 | ~1904 |
| Frank Link | Son | — | 13 | ~1927 |
| Thedis Link | Son | — | 15 | ~1925 |
| John Link | Son | — | 19 | ~1921 |
| Ruth Link | Daughter | — | 16 | ~1924 |
| Laverne Link | Daughter | — | 11 | ~1929 |
| Henry Link | Head | — | 39 | ~1901 |
Census Appearances
1930
Polk, Iowa
Son, age 9
Polk, Iowa · implied b. ~1921 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Link |
| Given Name | John H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Son, age 19
Polk-County, Iowa · implied b. ~1921 — 7 household members
| Surname | Link |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Crocker Twp |
| 1935 Residence (County) | Polk |
| Highest Grade | H-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 John Link across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Link
Son · 1940 · age 19 · b. ~1921 · Iowa
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Sibling
Frank Link
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Link
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thedis Link
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Laverne Link
Sibling · 1940 · age 11
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 — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01192-00396)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Floyd A. Hirsch | 32 | Head | Farmer | Iowa |
| 42 | Lola M. Hirsch | 32 | Wife | Housewife | Iowa |
| 43 | Frances Hirsch | 10 | Daughter | — | Iowa |
| 44 | Kendall Lee Hirsch | 5 | Son | — | Iowa |
| 45 | Minnie Sevanes | 86 | Head | Housewife | Illinois |
| 46 | Roscoe Sepaner | 42 | Head | Laborer | Iowa |
| 47 | Mildred Sepaner | 28 | Wife | Housewife | Iowa |
| 48 | Henry Link | 39 | Head | Laborer | Iowa |
| 49 | Viola Link | 36 | Wife | Housewife | Iowa |
| 50 | John Link THIS PERSON | 19 | Son | — | Iowa |
| 51 | Ruth Link | 16 | Daughter | — | Iowa |
| 52 | Thedis Link | 15 | Son | — | Iowa |
| 53 | Frank Link | 13 | Son | — | Iowa |
| 54 | Laverne Link | 11 | Daughter | — | Iowa |
| 55 | Arthur Fletcher | 56 | Head | Farmer | Illinois |
| 56 | Vesta Fletcher | 56 | Wife | Housewife | Iowa |
| 57 | Paul Fletcher | 23 | Son | Farmer | Iowa |
| 58 | Jacob A. Bury | 78 | Head | Farmer | Iowa |
| 59 | Doris Bury | 40 | Daughter | Housekeeper | Iowa |
| 60 | James Bury | 49 | Son | Farmer | Iowa |
| 61 | Ray Crum | 47 | Head | Farmer | Iowa |
| 62 | Hazel Crum | 50 | Wife | Housewife | Ohio |
| 63 | Lois Crum | 18 | Daughter | — | Iowa |
| 64 | John Erickson | 47 | Helper | Laborer | Illinois |
| 65 | Blasue Macchi | 34 | Head | Farmer | Iowa |
| 66 | Hazel Macchi | 24 | Wife | Housewife | Iowa |
| 67 | Roy Clark | 32 | Head | Mechanic | Iowa |
| 68 | Mabel Clark | 19 | Wife | Housewife | Iowa |
| 69 | Harvey White | 28 | Head | Laborer | Iowa |
| 70 | Evelyn White | 23 | Wife | — | Iowa |
| 71 | Larry White | 1 | Son | — | Iowa |
| 72 | Henry L. Wood | 47 | Head | Farmer | Iowa |
| 73 | Gertrude Wood | 50 | Wife | Housewife | Iowa |
| 74 | Marie Wood | 20 | Daughter | Teacher | Iowa |
| 75 | La Motte Wood | 18 | Son | Student | Iowa |
| 76 | Alpha Wood | 15 | Daughter | — | Iowa |
| 77 | Edgar Napier | 49 | Head | Assorter | Iowa |
| 78 | Esther Napier | 44 | Wife | Housewife | Iowa |
| 79 | Edgar Jr. Napier | 16 | Son | — | Iowa |
| 80 | Lola Napier | 14 | 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)