JL
James Lawrence — 1940 US Census Record
Model Tree available1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this James Lawrence across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents James & James — first a head (b.~1912), then head of a 4-person household.
Age 28
b. ~1912
Male
Head
Born: Tennessee
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Lawrence |
| Given Name | James G |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | Swarthmore |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Occupation | Chemical Engineer |
| Industry | Organic Chemicals |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2500 |
| Highest Grade | C-4 |
| 1935 Residence | Pennsylvania |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Occupation | Chemical Engineer |
| Township / Ward | Nether Providence T |
| Est. Birth Year | ~1912 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Lawrence | Head | — | 28 | ~1912 |
| James Lawrence | Son | — | 4 | ~1936 |
| Lee Lawrence | Son | — | 1 | ~1939 |
| Lois Lawrence | Spouse | — | 25 | ~1915 |
Census Appearances
1920
Delaware, Pennsylvania
Son, age 8
Delaware, Pennsylvania · implied b. ~1912 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lawrence |
| Given Name | James Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Missouri |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1930
Delaware, Pennsylvania
Son, age 18
Delaware, Pennsylvania · implied b. ~1912 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lawrence |
| Given Name | James C. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Delaware-County, Pennsylvania
Head, age 28
Delaware-County, Pennsylvania · implied b. ~1912 — 4 household members
| Surname | Lawrence |
| Given Name | James G |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | Swarthmore |
| 1935 Residence (County) | Delaware |
| Occupation | Chemical Engineer |
| Industry | Organic Chemicals |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2500 |
| Highest Grade | C-4 |
| 1935 Residence | Pennsylvania |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
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 Lawrence across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Lawrence (~0.92 confidence) and father James Lawrence (~0.92 confidence) and mother Mary Lawrence (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Lawrence
b. ~1889
Source father
● Household
· direct · ~0.92
Father
James Lawrence
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Mary Lawrence
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Lawrence
Head · 1940 · age 28 · b. ~1912 · Pennsylvania
★ You are viewing this record
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-t0627-03494-00222)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Carrie W Stewart | 51 | Wife | — | Pennsylvania |
| 2 | John R Quady | 29 | Son-in-law | Helper | Pennsylvania |
| 3 | Helen D Quady | 24 | Daughter | Sales Lady | Pennsylvania |
| 4 | Edwin B Kelley | 53 | Head | Jeweler | Pennsylvania |
| 5 | Lillian P Kelley | 45 | Wife | — | Pennsylvania |
| 6 | Dorothy Kelley | 25 | Daughter | Teacher | Pennsylvania |
| 7 | Boyd R Sr Hedrick | 48 | Head | Mechanic | Pennsylvania |
| 8 | Maybelle A Hedrick | 37 | Wife | — | Virginia |
| 9 | Boyd R Jr Hedrick | 8 | Son | — | Pennsylvania |
| 10 | James G Lawrence THIS PERSON | 28 | Head | Chemical Engineer | Tennessee |
| 11 | Lois W Lawrence | 25 | Wife | — | Arkansas |
| 12 | James G Iii Lawrence | 4 | Son | — | Arkansas |
| 13 | Lee W Lawrence | 1 | Son | — | Pennsylvania |
| 14 | William Sweeney | 53 | Head | Machinist | Pennsylvania |
| 15 | Gratta X Sweeney | 50 | Wife | — | Pennsylvania |
| 16 | Ralph Boushelle | 47 | Brother-in-law | Painter | Pennsylvania |
| 17 | Helen Boushelle | 45 | Sister-in-law | — | Pennsylvania |
| 18 | Anna Hughes | 75 | Mother-in-law | — | Pennsylvania |
| 19 | Dean C Mc Crea | 36 | Head | Clerk | Ohio |
| 20 | Edna X Mc Crea | 33 | Wife | — | Pennsylvania |
| 21 | Webster L Bowman | 37 | Head | Bookkeeper | Maryland |
| 22 | Veronica T Bowman | 37 | Wife | — | Pennsylvania |
| 23 | Veronica Bowman | 7 | Daughter | — | Pennsylvania |
| 24 | John Bowman | 13 | Son | — | Pennsylvania |
| 25 | William Graham | 27 | Head | Engineer | Pennsylvania |
| 26 | Lillian R Graham | 25 | Wife | — | Pennsylvania |
| 27 | Joan Audrey Graham | 1 | Daughter | — | Pennsylvania |
| 28 | Nelson Elliot | 36 | Head | Carpenter Foreman | Pennsylvania |
| 29 | Mary R Elliot | 37 | Wife | — | Pennsylvania |
| 30 | Mary Louise Elliot | 11 | Daughter | — | Pennsylvania |
| 31 | Elizabeth Elliot | 4 | Daughter | — | Pennsylvania |
| 32 | James Piddock | 26 | Head | Tester Operator | Pennsylvania |
| 33 | Jane X Piddock | 25 | Wife | — | Pennsylvania |
| 34 | Martha Jane Piddock | 2 | Daughter | — | Pennsylvania |
| 35 | Daniel Sayes | 26 | Brother-in-law | Paper Maker | Pennsylvania |
| 36 | Martha Sayes | 27 | Sister-in-law | — | Pennsylvania |
| 37 | John B. O. Mockridge | 37 | Head | Salesman | Michigan |
| 38 | Elizabeth B Mockridge | 33 | Wife | — | Pennsylvania |
| 39 | John M. Mockridge | 2 | Son | — | Pennsylvania |
| 40 | Paul Graff | 41 | Head | Chief Electrician | Pennsylvania |
Pedigree Summary
James
Gen 1 · 3 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)