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 Peter & Frederick — first a son (b.~1891), then head of a 3-person household.
Age 49
b. ~1891
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Nelson |
| Given Name | John P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore city |
| Additional Details | |
| Class of Worker | 200 |
| Highest Grade | H 2 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1891 |
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 |
|---|---|---|---|---|
| Katherine Nelson | Head | — | 79 | ~1861 |
| Ernest Smith | Other | — | 49 | ~1891 |
| John Nelson | Son | — | 49 | ~1891 |
Census Appearances
1920
Baltimore, Maryland
Son, age 28
Baltimore, Maryland · implied b. ~1892 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Oysters Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 39
Baltimore, Maryland · implied b. ~1891 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | John P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Germany |
| Occupation | Inspector |
| Industry | Maryland Meter Works |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Son, age 49
Baltimore-City-County, Maryland · implied b. ~1891 — 3 household members
| Surname | Nelson |
| Given Name | John P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore city |
| Class of Worker | 200 |
| Highest Grade | H 2 |
| 1935 Residence | Same House |
| 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: father Peter Nelson (~0.92 confidence) and father Frederick Nelson (~0.92 confidence) and mother Matilda Nelson (~0.92 confidence) and mother Katherine Nelson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Peter Nelson
b. ~1859
Source father
● Household
· direct · ~0.92
Father
Frederick Nelson
b. ~1869
Source father
● Household
· direct · ~0.92
Mother
Matilda Nelson
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Katherine Nelson
b. ~1861
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Nelson
Son · 1940 · age 49 · b. ~1891 · 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-t0627-01513-00561)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Antonia|Antonio Buemi | 43 | Head | Presser | Italy |
| 2 | Rose Buemi | 30 | Wife | Seamstress | Italy |
| 3 | John C. Butta | 27 | Head | Monotype Operator | Maryland |
| 4 | Josephine A. Butta | 26 | Wife | Seamstress | Maryland |
| 5 | Joseph P. Butta | 1 | Son | — | Maryland |
| 6 | Mary M. Ippolito | 51 | Head | Seamstress | Maryland |
| 7 | Mary Mildred Ippolito | 31 | Daughter | Clerk | Maryland |
| 8 | George T. Ippolito | 27 | Son | — | Maryland |
| 9 | Helene Caroline Ippolito | 76 | Mother | — | Bohemia |
| 10 | Emma E. Gifford | 81 | Head | — | Maryland |
| 11 | Frank C. Schmitt | 54 | Head | — | Maryland |
| 12 | Anna L. Schmitt | 52 | Wife | Housekeeper | Maryland |
| 13 | Leonard G. Schmitt | 25 | Son | Manager | Maryland |
| 14 | Edwin E. Wheeler | 45 | Head | Machine Operator | Maryland |
| 15 | Eva E. Wheeler | 42 | Wife | — | Maryland |
| 16 | Ferdinand C. Wheeler | 22 | Son | Shipping Clerk | Maryland |
| 17 | Elmer Wheeler | 21 | Son | Cutter | Maryland |
| 18 | Elton G. Wheeler | 20 | Son | Machine Operator | Maryland |
| 19 | Pearl A. Wheeler | 19 | Daughter | Housekeeper | Maryland |
| 20 | William F. Wheeler | 18 | Son | — | Maryland |
| 21 | Charles B. Wheeler | 15 | Son | — | Maryland |
| 22 | Dorothy Wheeler | 14 | Daughter | — | Maryland |
| 23 | Kenneth Wheeler | 10 | Son | — | Maryland |
| 24 | Evelyn Wheeler | 8 | Daughter | — | Maryland |
| 25 | Carl Wheeler | 7 | Son | — | Maryland |
| 26 | Donald Wheeler | 4 | Son | — | Maryland |
| 27 | Joan Wheeler | 1 | Daughter | — | Maryland |
| 28 | William P. Moak | 63 | Head | Salesman | Maryland |
| 29 | Anna E. Moak | 68 | Wife | — | Maryland |
| 30 | Howard Nelson | 46 | Head | Fireman | Maryland |
| 31 | Blanche W. Nelson | 40 | Wife | — | Maryland |
| 32 | Walter C. Nelson | 19 | Son | Busher | Maryland |
| 33 | Howard P. Nelson | 14 | Son | — | Maryland |
| 34 | Grace Monroe | 80 | Lodger | — | Maryland |
| 35 | John A. Koehler | 47 | Head | Agent | Maryland |
| 36 | Edna M. Koehler | 43 | Wife | Book Binder | Maryland |
| 37 | Ruth M. Koehler | 18 | Daughter | Clerk | Maryland |
| 38 | Katherine A. Nelson | 79 | Head | — | Germany |
| 39 | John P. Nelson THIS PERSON | 49 | Son | — | Maryland |
| 40 | Ernest H. Smith | 49 | Son-in-law | Inspector | Maryland |
Related Census Records
Pedigree Summary
John
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)