JL
James Lamb — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this James Lamb across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Theodore & Maud — first a son (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Lamb |
| Given Name | James A. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Undertaker |
| Industry | PW |
| Class of Worker | 0 |
| Hours Worked | 20 |
| Highest Grade | C-4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Undertaker |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1917 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Lamb | Son | — | 23 | ~1917 |
| Ida Lamb | Spouse | — | 47 | ~1893 |
| James Lamb | Head | — | 55 | ~1885 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 3
Allegheny, Pennsylvania · implied b. ~1917 — 15 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lamb |
| Given Name | James H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Ireland |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 13
Allegheny, Pennsylvania · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lamb |
| Given Name | James A. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 23
Allegheny-County, Pennsylvania · implied b. ~1917 — 3 household members
| Surname | Lamb |
| Given Name | James A. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Undertaker |
| Industry | PW |
| Class of Worker | 0 |
| Hours Worked | 20 |
| Highest Grade | C-4 |
| 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 James Lamb across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Theodore Lamb (~0.92 confidence) and mother Maud Lamb (~0.92 confidence) and father James Lamb (~0.92 confidence) and mother Ida Lamb (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Theodore Lamb
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Maud Lamb
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
James Lamb
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Ida Lamb
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Lamb
Son · 1940 · age 23 · b. ~1917 · 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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-03670-00056)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Carl W. Mcfarland | 43 | Head | Solicitor | Pennsylvania |
| 42 | Jean Mcfarland | 40 | Wife | — | Pennsylvania |
| 43 | Nancy Mcfarland | 6 | Daughter | — | Pennsylvania |
| 44 | Gladys Embree | 38 | Sister | Clerk | Pennsylvania |
| 45 | Robert Brooks | 42 | Head | Fireman | Pennsylvania |
| 46 | Grace Brooks | 35 | Wife | Secretary | Pennsylvania |
| 47 | Frederick W. Muck | 38 | Head | Mechanic | Pennsylvania |
| 48 | Sadie M. Muck | 33 | Wife | — | Pennsylvania |
| 49 | Sadie M. Muck | 5 | Daughter | — | Pennsylvania |
| 51 | Frank R. Goldstrom | 42 | Head | Production Man. | Pennsylvania |
| 52 | Ruth G. Goldstrom | 41 | Wife | — | Pennsylvania |
| 53 | Betty J. Goldstrom | 14 | Daughter | — | Pennsylvania |
| 54 | Ernest Goldstrom | 12 | Son | — | Pennsylvania |
| 55 | Oliver M. Topley | 53 | Head | Car Operator | Pennsylvania |
| 56 | Irene Topley | 47 | Wife | — | Pennsylvania |
| 57 | Melvina Topley | 22 | Daughter | Clerk | Pennsylvania |
| 58 | Dorothy Topley | 20 | Daughter | Beautician | Pennsylvania |
| 59 | Bernadine Topley | 16 | Daughter | — | Pennsylvania |
| 60 | George Robinson | 33 | Head | Driver | Pennsylvania |
| 61 | Jennie Robinson | 30 | Wife | — | Pennsylvania |
| 62 | George Robinson | 8 | Son | — | Pennsylvania |
| 63 | Jacob H. Manges | 61 | Head | Salesman | Pennsylvania |
| 64 | Maude M. Manges | 66 | Wife | — | Pennsylvania |
| 65 | Walter E. Manges | 45 | Head | Comer. Artist | Pennsylvania |
| 66 | Mary Manges | 55 | Sister | House Worker | Pennsylvania |
| 67 | William V. Mckeen | 35 | Head | Stationary Eng. | Pennsylvania |
| 68 | Elizabeth M. Mckeen | 31 | Wife | — | Pennsylvania |
| 69 | Betty Ann Mckeen | 10 | Daughter | — | Pennsylvania |
| 70 | Donald Mckeen | 6 | Son | — | Pennsylvania |
| 71 | Edward H. Zollinger | 50 | Head | Superintendent | Pennsylvania |
| 72 | Bertha C. Zollinger | 46 | Wife | — | Pennsylvania |
| 73 | Doris J. Zollinger | 13 | Daughter | — | Pennsylvania |
| 74 | James A. Lamb | 55 | Head | Yard Master | Pennsylvania |
| 75 | Ida N. Lamb | 47 | Wife | — | Pennsylvania |
| 76 | James A. Jr. Lamb THIS PERSON | 23 | Son | Undertaker | Pennsylvania |
| 77 | William Mcmurray | 41 | Head | Brakeman | Pennsylvania |
| 78 | Margaret Mcmurray | 36 | Wife | — | Pennsylvania |
| 79 | Janet Beck | 17 | Step-daughter | — | Pennsylvania |
Pedigree Summary
James
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)