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Mary Lawrence — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Mary Lawrence across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1889), then head of a 5-person household.
Age 51
b. ~1889
Female
Spouse
Born: Missouri
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Lawrence |
| Given Name | Mary K. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | Moylan |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Moylan |
| Est. Birth Year | ~1889 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Virginia Lawrence | Daughter | — | 16 | ~1924 |
| Jean Lawrence | Daughter | — | 13 | ~1927 |
| James Lawrence | Head | — | 51 | ~1889 |
| Dan Lawrence | Son | — | 23 | ~1917 |
| Mary Lawrence | Spouse | — | 51 | ~1889 |
Census Appearances
1920
Delaware, Pennsylvania
Spouse, age 31
Delaware, Pennsylvania · implied b. ~1889 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lawrence |
| Given Name | Mary L |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
Delaware, Pennsylvania
Spouse, age 41
Delaware, Pennsylvania · implied b. ~1889 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lawrence |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Missouri |
| Age at First Marriage | 21 |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Delaware-County, Pennsylvania
Spouse, age 51
Delaware-County, Pennsylvania · implied b. ~1889 — 5 household members
| Surname | Lawrence |
| Given Name | Mary K. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | Moylan |
| 1935 Residence (County) | Delaware |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Mary Lawrence across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Lawrence
Spouse · 1940 · age 51 · b. ~1889 · 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 — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03494-00260)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Betsy Reife | 13 | Daughter | — | Pennsylvania |
| 2 | Gay Reife | 10 | Daughter | — | Pennsylvania |
| 3 | Alexandra Reife | 4 | Daughter | — | Pennsylvania |
| 4 | Eva Staples | 19 | Servant | Domestic | Virginia |
| 5 | John G. Jr. Price | 30 | Head | Estimator | Pennsylvania |
| 6 | Marjorie R. Price | 26 | Wife | — | California |
| 7 | John G. 3Rd Price | 2 | Son | — | Pennsylvania |
| 8 | William Johnson | 24 | Servant | Houseman | Florida |
| 9 | Rose Mann | 29 | Servant | Domestic | Pennsylvania |
| 10 | Odessa Mann | 7 | Servant's daughter | — | Pennsylvania |
| 11 | Charles Ouram | 52 | Head | Draftsman | Pennsylvania |
| 12 | Gertrude H. Ouram | 50 | Wife | — | Pennsylvania |
| 13 | William L. Roberts | 45 | Head | Clerk | Pennsylvania |
| 14 | Viola R. Roberts | 39 | Wife | Clerk | Pennsylvania |
| 15 | Samuel L. Hayes | 39 | Head | Banker | Pennsylvania |
| 16 | Ann B. Hayes | 31 | Wife | — | Pennsylvania |
| 17 | Samuel L. 3Rd Hayes | 5 | Son | — | Pennsylvania |
| 18 | Barclay Hayes | 3 | Son | — | Pennsylvania |
| 19 | Merrell Hayes | 1 | Daughter | — | Pennsylvania |
| 20 | Edith Elliott | 35 | Servant | Servant | Pennsylvania |
| 21 | James C. Lawrence | 51 | Head | Chemical Engineer | New Jersey |
| 22 | Mary K. Lawrence THIS PERSON | 51 | Wife | — | Missouri |
| 23 | Dan Mac Laren Lawrence | 23 | Son | — | Scotland |
| 24 | Virginia Lawrence | 16 | Daughter | — | Pennsylvania |
| 25 | Jean Lawrence | 13 | Daughter | — | Pennsylvania |
| 26 | James P. Hill | None | Head | — | — |
| 27 | Mary Martha Hill | 25 | Wife | — | Scotland |
| 28 | M. Harry Hoyt | 66 | Head | Civil Engineer | Mississippi |
| 29 | Gertrude B. Hoyt | 64 | Wife | — | Pennsylvania |
| 30 | Owen H. Spencer | 55 | Head | Stationer | Pennsylvania |
| 31 | Jessie M. Spencer | 54 | Wife | — | Pennsylvania |
| 32 | Dorothy Spencer | 25 | Daughter | Social Service Worker | Pennsylvania |
| 33 | Jane Spencer | 21 | Daughter | — | Pennsylvania |
| 34 | Edward L. Stack | 42 | Head | Office Manager | New York |
| 35 | Elizabeth J. Stack | 39 | Wife | — | Pennsylvania |
| 36 | J. Robert James | 45 | Head | Salesman | Pennsylvania |
| 37 | Dorothy B. James | 40 | Wife | — | Pennsylvania |
| 38 | Mary James | 9 | Daughter | — | Pennsylvania |
| 39 | Caroline James | 7 | Daughter | — | Pennsylvania |
| 40 | Margaret James | 4 | Daughter | — | Pennsylvania |
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)