JL
John Long — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this John Long across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents Frederick & Carroll — first a head (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Long |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Machinist Helper |
| Industry | Capping Plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Machinist Helper |
| Township / Ward | Baltimore |
| Est. Birth Year | ~1918 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Long | Daughter | — | 7 | ~1933 |
| John Long | Head | — | 22 | ~1918 |
| Teresa Long | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Baltimore, Maryland
Son, age 2
Baltimore, Maryland · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Long |
| Given Name | John E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
None, Maryland
Son, age 12
None, Maryland · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Long |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Head, age 22
Baltimore-City-County, Maryland · implied b. ~1918 — 3 household members
| Surname | Long |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore City |
| Occupation | Machinist Helper |
| Industry | Capping Plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| Highest Grade | No 6 |
| 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 Long across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Frederick Long (~0.92 confidence) and father Carroll Long (~0.92 confidence) and mother Julia Long (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frederick Long
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Carroll Long
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Julia Long
b. ~1897
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Long
Head · 1940 · age 22 · b. ~1918 · Maryland
★ 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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01537-00576)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Maude Famous | 62 | Wife | — | Maryland |
| 42 | Harry Winkelman | 45 | Head | Car Inspector | Maryland |
| 43 | Josephine Winkelman | 36 | Wife | — | North Carolina |
| 44 | Littin Sharp | 58 | Head | Moulder | Tennessee |
| 45 | Elizabeth Sharp | 42 | Wife | — | Germany |
| 46 | Arcee Sharp | 19 | Son | Laborer | Germany |
| 47 | George L. Phipps | 36 | Head | Painter | Maryland |
| 48 | Anna M. Phipps | 38 | Wife | — | Maryland |
| 49 | Paul L. Phipps | 12 | Son | — | Maryland |
| 50 | John Long THIS PERSON | 22 | Head | Machinist Helper | Maryland |
| 51 | Teresa Long | 45 | Wife | — | Maryland |
| 52 | Margaret Long | 7 | Daughter | — | Maryland |
| 53 | Wieland Henkel | 53 | Head | Fitter | Germany |
| 54 | Anna Henkel | 47 | Wife | — | Maryland |
| 55 | Rudolph Henkel | 25 | Son | Steward | Germany |
| 56 | Margaret Henkel | 21 | Daughter | Nurse | Germany |
| 57 | Mary Juester | 70 | Mother in law | — | Germany |
| 58 | Dorothea Juester | 44 | Sister in law | Seamstress | Maryland |
| 59 | Head Kaiser-Dorthy | None | F | Telephone Company | — |
| 60 | Joseph Kaiser-Dorthy | 27 | Brother | Lawyer | Maryland |
| 61 | Robert Wayland | 69 | Head | — | Virginia |
| 62 | Hattie Wayland | 61 | Wife | — | Virginia |
| 63 | Evelyn Wells | 40 | Daughter | — | Virginia |
| 64 | Frank Wells | 23 | Grandson | Joiner | Maryland |
| 65 | June Wells | 16 | Granddaughter | — | Washington DC |
| 66 | Harry Moreland | 71 | Boarder | — | Maryland |
| 67 | Clarance Snyder | 36 | Boarder | Foreman | Virginia |
| 68 | James Rott | 42 | Head | Ship Fitter | Maryland |
| 69 | Annabelle Rott | 38 | Wife | — | Maryland |
| 70 | George H. Rott | 18 | Son | — | Maryland |
| 71 | Bernard Rott | 16 | Son | Apprentice | Maryland |
| 72 | Lorraine Rott | 14 | Daughter | — | Maryland |
| 73 | Ronald Rott | 3 | Son | — | Maryland |
| 74 | James Gigliois | 43 | Head | Blocker | Italy |
| 75 | Grace Gigliois | 37 | Wife | — | Italy |
| 76 | Michael Gigliois | 14 | Son | — | Maryland |
| 77 | Carmelia Gigliois | 13 | Daughter | — | Maryland |
| 78 | Colombia Gigliois | 12 | Son | — | Maryland |
| 79 | Anna Gigliois | 8 | Daughter | — | Maryland |
| 80 | James Jr. Gigliois | 5 | Son | — | Maryland |
Pedigree Summary
John
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)