LJ
Lawrence Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Lawrence Johnson across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Mary & Lotta — first a son (b.~1915), then head of a 8-person household.
Age 25
b. ~1915
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Johnson |
| Given Name | Lawrence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | CHESTER CITY |
| 1935 Residence (County) | DELAWARE |
| Additional Details | |
| Class of Worker | PW |
| Hours Worked | 70 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Chester City |
| Est. Birth Year | ~1915 |
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 Lawrence | Age | Birth yr |
|---|---|---|---|---|
| Edna Johnson | Daughter | — | 21 | ~1919 |
| Anna Mckenna | Daughter | — | 23 | ~1917 |
| Mary Mckenna | Daughter | — | 3 | ~1937 |
| Mary Johnson | Head | — | 52 | ~1888 |
| Ronald Johnson | Other | — | 3 | ~1937 |
| Harry Johnson | Son | — | 29 | ~1911 |
| Lawrence Johnson | Son | — | 25 | ~1915 |
| Joseph Johnson | Son | — | 18 | ~1922 |
Census Appearances
1920
Montgomery, Pennsylvania
Son, age 5
Montgomery, Pennsylvania · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Lawrence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Delaware, Pennsylvania
Son, age 15
Delaware, Pennsylvania · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Lawrence |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Delaware-County, Pennsylvania
Son, age 25
Delaware-County, Pennsylvania · implied b. ~1915 — 8 household members
| Surname | Johnson |
| Given Name | Lawrence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | CHESTER CITY |
| 1935 Residence (County) | DELAWARE |
| Class of Worker | PW |
| Hours Worked | 70 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Lawrence Johnson across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: mother Mary Johnson (~0.92 confidence) and mother Lotta Johnson (~0.92 confidence) and father Charles Johnson (~0.92 confidence) and mother Mary Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Johnson
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Lotta Johnson
b. ~1889
Source mother
● Household
· direct · ~0.92
Father
Charles Johnson
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Mary Johnson
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Lawrence Johnson
Son · 1940 · age 25 · b. ~1915 · Pennsylvania
★ You are viewing this record
Sibling
Mary Mckenna
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edna Johnson
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Mckenna
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harry Johnson
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Johnson
Sibling · 1940 · age 18
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 — 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-t0627-03488-00153)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Josephine Osales | 21 | Lodger | Cigarmaker | Pennsylvania |
| 2 | Karol Pentukas | 58 | Lodger | — | Lithuania |
| 3 | John Gordon | 60 | Head | — | Pennsylvania |
| 4 | James Gordon | 51 | Brother | Clerk | Pennsylvania |
| 5 | Elena Gordon | 58 | Sister | — | Pennsylvania |
| 6 | Fredel Evens | 48 | Head | Mechanic | Pennsylvania |
| 7 | Eliza Evens | 49 | Wife | — | Pennsylvania |
| 8 | Sara Ferguson | 71 | Head | — | Pennsylvania |
| 9 | Lenoy Duren | 67 | Sister | — | Pennsylvania |
| 10 | Alexander Gordon | 62 | Head | Joiner | Pennsylvania |
| 11 | Nellie Gordon | 63 | Wife | — | Pennsylvania |
| 12 | Mary L. Johnson | 52 | Head | — | Pennsylvania |
| 13 | Harry Johnson | 29 | Son | — | Pennsylvania |
| 14 | Lawrence Johnson THIS PERSON | 25 | Son | — | Pennsylvania |
| 15 | Edna Johnson | 21 | Daughter | — | Pennsylvania |
| 16 | Joseph Johnson | 18 | Son | — | Pennsylvania |
| 17 | Ronald Johnson | 3 | Grandson | — | Pennsylvania |
| 18 | Anna Mckenna | 23 | Daughter | — | Pennsylvania |
| 19 | Mary Mckenna | 3 | Daughter | — | Pennsylvania |
| 20 | Maritz Diorio | 44 | Head | Laborer | Italy |
| 21 | Mary Diorio | 37 | Wife | Dressmaker | Italy |
| 22 | Angeline Diorio | 19 | Daughter | — | Pennsylvania |
| 23 | Vincent Diorio | 16 | Son | — | Pennsylvania |
| 24 | Thomas Diorio | 15 | Son | — | Pennsylvania |
| 25 | Victor Diorio | 11 | Son | — | Pennsylvania |
| 26 | Maritz Diorio | 9 | Son | — | Pennsylvania |
| 27 | Stevens Ciosta | 48 | Head | — | Italy |
| 28 | Rose Ciosta | 38 | Wife | — | Italy |
| 29 | Clement Ciosta | 21 | Son | — | New York |
| 30 | Thomas Ciosta | 19 | Son | Truck Driver | New York |
| 31 | Stevens Jr. Ciosta | 8 | Son | — | Pennsylvania |
| 32 | John W. Poblenski | 31 | Head | Policeman | New York |
| 33 | Mary H. Poblenski | 25 | Wife | — | Pennsylvania |
| 34 | Anna Shippey | 30 | Head | Cone Winder | Pennsylvania |
| 35 | Stella Shippey | 8 | Daughter | — | Pennsylvania |
| 36 | Mary Shippey | 52 | Aunty | — | Pennsylvania |
| 37 | Joseph Roust | 40 | Head | Machinist Helper | Massachusetts |
| 38 | Agnes Roust | 45 | Wife | — | Pennsylvania |
| 39 | Francis Roust | 23 | Son | Driver | Pennsylvania |
| 40 | Robert Roust | 14 | Son | — | Pennsylvania |
Pedigree Summary
Lawrence + 5 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)