JL
John Lambert — 1940 US Census Record
Model Tree available1940 United States Federal Census · Carroll-County, Maryland
Our Model Tree links this John Lambert across the 1920, 1930 and 1940 US Censuses in Carroll-County, Maryland (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1919), then head of a 5-person household.
Age 21
b. ~1919
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Carroll-County, Maryland |
| Surname | Lambert |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Manchester Town |
| 1935 Residence (County) | Carroll |
| Additional Details | |
| Occupation | truck driver |
| Class of Worker | PW |
| Hours Worked | 18 |
| Income (1939) | 800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Truck Driver |
| Township / Ward | Manchester Town |
| Est. Birth Year | ~1919 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| William Lambert | Head | — | 53 | ~1887 |
| John Newcomer | Other | — | 73 | ~1867 |
| Charles Lambert | Son | — | 16 | ~1924 |
| John Lambert | Son | — | 21 | ~1919 |
| Gertie Lambert | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Carroll, Maryland
Son, age 1
Carroll, Maryland · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lambert |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Carroll, Maryland
Son, age 11
Carroll, Maryland · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lambert |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Carroll-County, Maryland
Son, age 21
Carroll-County, Maryland · implied b. ~1919 — 5 household members
| Surname | Lambert |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Manchester Town |
| 1935 Residence (County) | Carroll |
| Occupation | truck driver |
| Class of Worker | PW |
| Hours Worked | 18 |
| Income (1939) | 800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 John Lambert across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Lambert (~0.92 confidence) and father William Lambert (~0.92 confidence) and father William Lambert (~0.92 confidence) and mother Gertie Lambert (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Lambert
b. ~1887
Source father
● Household
· direct · ~0.92
Father
William Lambert
b. ~1887
Source father
● Household
· direct · ~0.92
Father
William Lambert
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Gertie Lambert
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Lambert
Son · 1940 · age 21 · b. ~1919 · Maryland
★ You are viewing this record
Sibling
Charles Lambert
Sibling · 1940 · age 16
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 — Carroll-County, Maryland
Open full size
1940 US Federal Census — Carroll-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01544-00446)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Geo M Reese | 50 | Head | Farmer | Maryland |
| 2 | Marie Reese | 53 | Wife | — | Maryland |
| 3 | Harry J Rhodes | 62 | Head | Laborer | Maryland |
| 4 | Effie Rhodes | 63 | Wife | — | Maryland |
| 5 | Ralph P Martin | 39 | Head | — | Maryland |
| 6 | Mabel Martin | 39 | Wife | — | Maryland |
| 7 | John Martin | 2 | Son | — | Maryland |
| 8 | Robert H Kuhn | 51 | Head | Laborer | Maryland |
| 9 | Mettie Kuhn | 51 | Wife | Seamstress | Maryland |
| 10 | Vernon Kuhn | 24 | Son | — | Maryland |
| 11 | Geo E Trump | 41 | Head | Garage | Maryland |
| 12 | Alva Trump | 40 | Wife | — | Maryland |
| 13 | Geo Jr Trump | 9 | Son | — | Maryland |
| 14 | Chrystelle Trump | 2 | Daughter | — | Maryland |
| 15 | William Wagner | 27 | Lodger | Laborer | Maryland |
| 16 | Anthony De Palmer | 32 | Head | Machinist | Virginia |
| 17 | Mary De Palmer | 24 | Wife | — | Maryland |
| 18 | Vincent De Palmer | 4 | Son | — | Maryland |
| 19 | William Brilhart | 57 | Head | Attendant | Maryland |
| 20 | Laura Brilhart | 54 | Wife | — | Maryland |
| 21 | Mary Myers | 42 | Sister-law | Examiner | Maryland |
| 22 | Thelma Ghisler | 22 | Head | Presser | Pennsylvania |
| 23 | Margaret Ghisler | 21 | Wife | — | Pennsylvania |
| 24 | Walter Ghisler | 1 | Son | — | Pennsylvania |
| 25 | William D Lambert | 53 | Head | Truck & Bus | Maryland |
| 26 | Gertie E Lambert | 48 | Wife | — | Maryland |
| 27 | John W Lambert THIS PERSON | 21 | Son | Truck Driver | Maryland |
| 28 | Charles F Lambert | 16 | Son | Musician | Maryland |
| 29 | John Newcomer | 73 | Father-law | Laborer | Pennsylvania |
| 30 | Ada C Leese | 65 | Head | Wash Lady | Maryland |
| 31 | John S Hollenbach | 41 | Head | Minister | Pennsylvania |
| 32 | Eleanor Hollenbach | 44 | Wife | — | Pennsylvania |
| 33 | John Jr Hollenbach | 16 | Son | — | Pennsylvania |
| 34 | Alice Hollenbach | 12 | Daughter | — | Pennsylvania |
| 35 | Katherine Hollenbach | 9 | Daughter | — | Pennsylvania |
| 36 | Mrs Alice Barber | 79 | Mother-in-law | — | Pennsylvania |
| 37 | William L Hoffman | 64 | Head | Clerk | Maryland |
| 38 | Julia S Hoffman | 60 | Wife | Time Worker | Maryland |
| 39 | Amelia Shaver | 85 | Mother-in-law | — | Maryland |
| 40 | Earl L Yingling | 23 | Head | Forest Warden | Maryland |
Pedigree Summary
John + 1 sibling
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)