MJ
Martha Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mckean-County, Pennsylvania
Our Model Tree links this Martha Johnson across the 1920, 1930 and 1940 US Censuses in Mckean-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1893), then head of a 8-person household.
Age 47
b. ~1893
Female
Spouse
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mckean-County, Pennsylvania |
| Surname | Johnson |
| Given Name | Martha |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Liberty twp |
| Additional Details | |
| Highest Grade | 7 |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Township / Ward | Liberty Twp |
| Est. Birth Year | ~1893 |
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 Martha | Age | Birth yr |
|---|---|---|---|---|
| Betty Johnson | Daughter | — | 9 | ~1931 |
| Helen Johnson | Daughter | — | 23 | ~1917 |
| Albert Johnson | Head | — | 49 | ~1891 |
| Jim Scott | Other | — | 5 | ~1935 |
| Raymond Johnson | Son | — | 19 | ~1921 |
| Howard Johnson | Son | — | 15 | ~1925 |
| Richard Johnson | Son | — | 7 | ~1933 |
| Martha Johnson | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Mckean, Pennsylvania
Spouse, age 27
Mckean, Pennsylvania · implied b. ~1893 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martha E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | New York |
| Father's Birthplace | United States |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Mckean, Pennsylvania
Spouse, age 37
Mckean, Pennsylvania · implied b. ~1893 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Martha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | New York |
| Age at First Marriage | 22 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Mckean-County, Pennsylvania
Spouse, age 47
Mckean-County, Pennsylvania · implied b. ~1893 — 8 household members
| Surname | Johnson |
| Given Name | Martha |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Liberty twp |
| Highest Grade | 7 |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 Martha Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Martha Johnson
Spouse · 1940 · age 47 · b. ~1893 · Pennsylvania
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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 — Mckean-County, Pennsylvania
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1940 US Federal Census — Mckean-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03569-00406)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Genevieve Coleman | 2 | daughter | — | New York |
| 2 | D Ernest Brown | 53 | head | Caretaker | New Hampshire |
| 3 | Beryl Brown | 54 | wife | — | Pennsylvania |
| 4 | Mary Reade | 84 | mother-in-law | — | New York |
| 5 | Joseph M Linnane | 31 | head | Machine Operator | West Virginia |
| 6 | Iris Linnane | 27 | wife | — | Pennsylvania |
| 7 | Joanna Linnane | 1 | daughter | — | Pennsylvania |
| 8 | David Scherer | 57 | head | Filling Station | Pennsylvania |
| 9 | Emily Scherer | 57 | wife | Lunch Room Operator | Pennsylvania |
| 10 | Albert Johnson | 49 | head | Dairyman | Pennsylvania |
| 11 | Martha Johnson THIS PERSON | 47 | wife | — | New York |
| 12 | Helen Johnson | 23 | daughter | — | Pennsylvania |
| 13 | Raymond Johnson | 19 | son | — | Pennsylvania |
| 14 | Howard Johnson | 15 | son | — | Pennsylvania |
| 15 | Betty Lou Johnson | 9 | daughter | — | Pennsylvania |
| 16 | Richard Johnson | 7 | son | — | Pennsylvania |
| 17 | Jim Scott | 5 | hired hand | Laborer | Pennsylvania |
| 18 | R. D. Andrews | 24 | head | Laborer | Arkansas |
| 19 | Norene Andrews | 21 | wife | Farmer | Arkansas |
| 20 | Donald L Andrews | 1 | son | — | Pennsylvania |
| 21 | John L Murphy | 46 | head | — | Pennsylvania |
| 22 | Goldie Murphy | 34 | wife | — | Pennsylvania |
| 23 | Helen M Murphy | 15 | daughter | — | New York |
| 24 | Lawrence E Murphy | 11 | son | — | Pennsylvania |
| 25 | John Jr Murphy | 6 | son | — | Pennsylvania |
| 26 | William Murphy | 57 | brother | — | Pennsylvania |
| 27 | Aaron Anderson | 50 | head | Farm Laborer | Sweden |
| 28 | Edith Anderson | 18 | daughter | — | Pennsylvania |
| 29 | John Lymon | 54 | head | Proprietor | Pennsylvania |
| 30 | Lena Lymon | 52 | wife | — | Pennsylvania |
| 31 | Ida Nelson | 72 | head | — | Sweden |
| 32 | Elmer Nelson | 38 | son | Packer | Pennsylvania |
| 33 | Mildred Carlson | 35 | head | — | Pennsylvania |
| 34 | Alma Carlson | 17 | daughter | — | Pennsylvania |
| 35 | Thomas Franklin | 60 | father | — | Iowa |
| 36 | Wellington Ditchon | 30 | boarder | Farm Laborer | Pennsylvania |
| 37 | Lloyd Smith | 49 | head | Pressman | New York |
| 38 | Annie Smith | 54 | wife | — | New York |
| 39 | Cassandra Smith | 12 | granddaughter | — | New York |
| 40 | Carolyn Smith | 8 | granddaughter | — | New York |
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)