JN
John Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this John Nelson across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents Katherine & Alice — first a son (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Nelson |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Cab Driver |
| Industry | Taxi |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 110 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Cab Driver |
| Township / Ward | Baltimore City |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Katherine Crowley | Head | — | 33 | ~1907 |
| Emily Scoffle | Other | — | 65 | ~1875 |
| John Nelson | Son | — | 22 | ~1918 |
| S Crowley | Son | — | 13 | ~1927 |
| Richard Crowley | Son | — | 11 | ~1929 |
Census Appearances
1920
Baltimore, Maryland
Son, age 1
Baltimore, Maryland · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Neilson |
| Given Name | John |
| 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
Baltimore, Maryland
Son, age 11
Baltimore, Maryland · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | John J. |
| 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
Baltimore-City-County, Maryland
Son, age 22
Baltimore-City-County, Maryland · implied b. ~1918 — 5 household members
| Surname | Nelson |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Cab Driver |
| Industry | Taxi |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 110 |
| 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 Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Katherine Crowley (~0.60 confidence) and mother Alice Neilson (~0.92 confidence) and father John Nelson (~0.92 confidence) and mother Helen Nelson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.84
Mother
Katherine Crowley
b. ~1907
Source mother
● Household
· direct · ~0.6
Mother
Alice Neilson
b. ~1885
Source mother
● Household
· direct · ~0.92
Father
John Nelson
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Helen Nelson
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Nelson
Son · 1940 · age 22 · b. ~1918 · Maryland
★ You are viewing this record
Sibling
Richard Crowley
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
S Crowley
Sibling · 1940 · age 13
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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
8 people indexed on this census page (nara:1940:m-t0627-01520-00406)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | Katherine Crowley | 33 | Head | Clerk | Washington D.C. |
| 3 | S. Bradford Crowley | 13 | Son | — | Washington D.C. |
| 4 | Richard P. (At) Crowley | 11 | Son | — | Washington D.C. |
| 5 | Emily Scoffle | 65 | Lodger | Companion | Maryland |
| 8 | John E. Nelson THIS PERSON | 22 | Son | Cab Driver | Maryland |
| 10 | Charles H. Thompson | 34 | Head | House Painter | Ohio |
| 11 | Doris E. Thompson | 33 | Wife | — | W. Va. |
| 12 | Donna L. Thompson | 3 | Daughter | — | W. Va. |
Pedigree Summary
John + 2 siblings
Gen 1 · 4 parents
~0.84
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)