JB
James Blair — 1940 US Census Record
Model Tree available1940 United States Federal Census · Knox-County, Nebraska
Our Model Tree links this James Blair across the 1920, 1930 and 1940 US Censuses in Knox-County, Nebraska (XGBoost, ~Confirmed), with identified parents Martin & Ivah — first a son (b.~1916), then head of a 12-person household.
Age 24
b. ~1916
Male
Son
Born: Nebraska
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Knox-County, Nebraska |
| Surname | Blair |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Nebraska |
| 1935 Residence (City) | Creighton City |
| 1935 Residence (County) | Knox |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 360 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
| Occupation | Laborer |
| Township / Ward | Creighton City |
| Est. Birth Year | ~1916 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Dale Blair | Son | — | 6 | ~1934 |
| Barbara Blair | Daughter | — | 3 | ~1937 |
| Raymond Blair | Son | — | 12 | ~1928 |
| Ivah Blair | Spouse | — | 45 | ~1895 |
| Edward Blair | Son | — | 16 | ~1924 |
| Martin Blair | Head | — | 52 | ~1888 |
| Verna Blair | Daughter | — | 5 | ~1935 |
| Evelyn Blair | Daughter | — | 15 | ~1925 |
| Bernard Blair | Son | — | 18 | ~1922 |
| James Blair | Son | — | 24 | ~1916 |
| Harold Blair | Son | — | 9 | ~1931 |
| Edna Blair | Daughter | — | 10 | ~1930 |
Census Appearances
1920
Knox, Nebraska
Son, age 4
Knox, Nebraska · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Nebraska |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1930
Knox, Nebraska
Son, age 14
Knox, Nebraska · implied b. ~1916 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | James W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Nebraska |
| Can Read/Write | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1940
Knox-County, Nebraska
Son, age 24
Knox-County, Nebraska · implied b. ~1916 — 12 household members
| Surname | Blair |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Nebraska |
| 1935 Residence (City) | Creighton City |
| 1935 Residence (County) | Knox |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 360 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
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 Blair across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Martin Blair (~0.92 confidence) and mother Ivah Blair (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Martin Blair
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Ivah Blair
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Blair
Son · 1940 · age 24 · b. ~1916 · Nebraska
★ You are viewing this record
Sibling
Edward Blair
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dale Blair
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Verna Blair
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Blair
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Blair
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Blair
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Blair
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edna Blair
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Evelyn Blair
Sibling · 1940 · age 15
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 — Knox-County, Nebraska
Open full size
1940 US Federal Census — Knox-County, Nebraska
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02252-00607)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John D. Clancy | 81 | Head | — | Ireland |
| 2 | Christina Clancy | 76 | Wife | — | Denmark |
| 3 | J. R. Baxter | 68 | Head | General Repair | Wisconsin |
| 4 | Emma Baxter | 64 | Wife | — | Nebraska |
| 5 | Martin Blair | 52 | Head | Truck Driver | Denmark |
| 6 | Ivah Blair | 45 | Wife | — | Nebraska |
| 7 | James Blair THIS PERSON | 24 | Son | Laborer | Nebraska |
| 8 | Bernard Blair | 18 | Son | Field Worker | Nebraska |
| 9 | Edward Blair | 16 | Son | Chore Boy | Nebraska |
| 10 | Evelyn Blair | 15 | Daughter | — | Nebraska |
| 11 | Raymond Blair | 12 | Son | — | Nebraska |
| 12 | Edna Blair | 10 | Daughter | — | Nebraska |
| 13 | Harold Blair | 9 | Son | — | Nebraska |
| 14 | Dale Blair | 6 | Son | — | Nebraska |
| 15 | Verna Jean Blair | 5 | Daughter | — | Nebraska |
| 16 | Barbara Ann Blair | 3 | Daughter | — | Nebraska |
| 17 | Perry W. Hammerly | 61 | Head | Carpenter | Iowa |
| 18 | Effie Hammerly | 57 | Wife | — | Nebraska |
| 19 | Joseph H. Stoddard | 84 | Head | Farmer | Connecticut |
| 20 | Nellie Stoddard | 27 | Daughter | — | Nebraska |
| 21 | Frank H. Slaba | 48 | Head | Laborer | Bohemia |
| 22 | Idah Slaba | 43 | Wife | — | Nebraska |
| 23 | Donald Slaba | 17 | Son | — | Nebraska |
| 24 | Eugene Slaba | 13 | Son | — | Nebraska |
| 25 | Sam Young | 82 | Head | — | Ohio |
| 26 | Ella May Young | 57 | Wife | — | Wisconsin |
| 27 | Clayton F. Long | 69 | Head | — | Pennsylvania |
| 28 | Anna Long | 66 | Wife | — | Wisconsin |
| 29 | E. R. Johnson | 62 | Head | Manager | Nebraska |
| 30 | Lenna Johnson | 57 | Wife | — | Nebraska |
| 31 | Charles Hoferer | 55 | Head | Joint Owner | Nebraska |
| 32 | Frieda Hoferer | 46 | Wife | — | Nebraska |
| 33 | Charles Hoferer | 23 | Son | Laborer | Nebraska |
| 34 | Carl Anderson | 57 | Head | Station Agent | Denmark |
| 35 | Anna Anderson | 55 | Wife | — | Sweden |
| 36 | Benjamin F. Cannon | 54 | Head | Gardner | Nebraska |
| 37 | Lena L. Cannon | 51 | Wife | — | Nebraska |
| 38 | Rhoda Mae Cannon | 25 | Daughter | Housework | Nebraska |
| 39 | Eunice Cannon | 22 | Daughter | Housework | Nebraska |
| 40 | Elmyra Cannon | 17 | Daughter | — | Nebraska |
Pedigree Summary
James + 9 siblings
Gen 1 · 2 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)