RA
Robert Armstrong — 1940 US Census Record
Model Tree available1940 United States Federal Census · Blue-Earth-County, Minnesota
Our Model Tree links this Robert Armstrong across the 1920, 1930 and 1940 US Censuses in Blue-Earth-County, Minnesota (XGBoost, ~Confirmed), with identified parents Clancy & Clarence — first a son (b.~1919), then head of a 9-person household.
Age 21
b. ~1919
Male
Son
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Blue-Earth-County, Minnesota |
| Surname | Armstrong |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Lyra township |
| 1935 Residence (County) | Blue Earth |
| Additional Details | |
| Occupation | farm laborer |
| Industry | farm |
| Class of Worker | NP |
| Hours Worked | 24 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Farm Laborer |
| Township / Ward | Lyra Township |
| Est. Birth Year | ~1919 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Roberta Armstrong | Daughter | — | 7 | ~1933 |
| Florence Armstrong | Daughter | — | 22 | ~1918 |
| Mildred Armstrong | Daughter | — | 18 | ~1922 |
| Clarence Armstrong | Head | — | 54 | ~1886 |
| Robert Armstrong | Son | — | 21 | ~1919 |
| Clayton Armstrong | Son | — | 20 | ~1920 |
| Allen Armstrong | Son | — | 13 | ~1927 |
| Clinton Armstrong | Son | — | 20 | ~1920 |
| Frances Armstrong | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Blue Earth, …
Son, age 1
Blue Earth, Minnesota · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Blue Earth, …
Son, age 11
Blue Earth, Minnesota · implied b. ~1919 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Robert S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Blue-Earth-County, Minnesota
Son, age 21
Blue-Earth-County, Minnesota · implied b. ~1919 — 9 household members
| Surname | Armstrong |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Lyra township |
| 1935 Residence (County) | Blue Earth |
| Occupation | farm laborer |
| Industry | farm |
| Class of Worker | NP |
| Hours Worked | 24 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Robert Armstrong across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Clancy Armstrong (~0.92 confidence) and father Clarence Armstrong (~0.92 confidence) and mother Frances Armstrong (~0.92 confidence) and mother Beatrice Armstrong (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Clancy Armstrong
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Clarence Armstrong
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Frances Armstrong
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Beatrice Armstrong
b. ~1899
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Armstrong
Son · 1940 · age 21 · b. ~1919 · Minnesota
★ You are viewing this record
Sibling
Roberta Armstrong
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Armstrong
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clinton Armstrong
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Allen Armstrong
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Armstrong
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clayton Armstrong
Sibling · 1940 · age 20
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 — Blue-Earth-County, Minnesota
Open full size
1940 US Federal Census — Blue-Earth-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01908-00300)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Clarence Armstrong | 54 | head | Farmer | Minnesota |
| 2 | Frances Armstrong | 52 | wife | — | Minnesota |
| 3 | Florence Armstrong | 22 | daughter | Trained Nurse | Minnesota |
| 4 | Robert Armstrong THIS PERSON | 21 | son | Farm Laborer | Minnesota |
| 5 | Clinton Armstrong | 20 | son | Farm Laborer | Minnesota |
| 6 | Clayton Armstrong | 20 | son | Farm Laborer | Minnesota |
| 7 | Mildred Armstrong | 18 | daughter | — | Minnesota |
| 8 | Allen Lee Armstrong | 13 | son | — | Minnesota |
| 9 | Roberta Armstrong | 7 | daughter | — | Minnesota |
| 10 | Oscar Dehn | 31 | head | Farmer | Minnesota |
| 11 | Esther Dehn | 33 | wife | — | Minnesota |
| 12 | Darrell Dehn | 11 | son | — | Minnesota |
| 13 | Phyllis Dehn | 6 | daughter | — | Minnesota |
| 14 | Nick Hollerich | 56 | head | Farmer | Luxemburg |
| 15 | Minnie Hollerich | 52 | wife | Farm Laborer | Iowa |
| 16 | Martha Hollerich | 21 | daughter | — | Minnesota |
| 17 | John Hollerich | 19 | son | Farm Laborer | Minnesota |
| 18 | Peter Hollerich | 17 | son | Farm Laborer | Minnesota |
| 19 | Samuel Hollerich | 14 | son | Farm Laborer | Minnesota |
| 20 | Rose Ann Hollerich | 10 | daughter | — | Minnesota |
| 21 | Frank Krueger | 48 | head | Farmer | Germany |
| 22 | Nora Krueger | 38 | wife | Farm Laborer | Minnesota |
| 23 | Eleanor Krueger | 20 | daughter | Housekeeper | Minnesota |
| 24 | Audrey Krueger | 16 | daughter | — | Minnesota |
| 25 | Carlyle Krueger | 12 | son | — | Minnesota |
| 26 | Eunice Krueger | 10 | daughter | — | Minnesota |
| 27 | Wallace Krueger | 7 | son | — | Minnesota |
| 28 | Carol Krueger | 4 | daughter | — | Minnesota |
| 29 | Elden Krueger | 18 | son | Clerk | Minnesota |
| 30 | Alfred Olson | 62 | head | Farmer | Minnesota |
| 31 | Grace Olson | 46 | wife | Farm Laborer | Minnesota |
| 32 | Marguerite Olson | 7 | daughter | — | Minnesota |
| 33 | Horace Franklin | 49 | head | Farmer | Minnesota |
| 34 | Beda Franklin | 47 | wife | — | Minnesota |
| 35 | Gordon A. Franklin | 18 | son | — | Minnesota |
| 36 | Donald Franklin | 16 | son | Farm Laborer | Minnesota |
| 37 | Clark Franklin | 14 | son | — | Minnesota |
| 38 | Norman Franklin | 8 | son | — | Minnesota |
| 39 | Rilla Franklin | 7 | daughter | — | Minnesota |
| 40 | Thorl Oachs | 25 | head | Farmer | Minnesota |
Pedigree Summary
Robert + 6 siblings
Gen 1 · 4 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)