JN
John Nicholson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Montgomery-County, Maryland
Our Model Tree links this John Nicholson across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Maryland (XGBoost, ~Confirmed), with identified parents John & Sara — first a son (b.~1900), then head of a 4-person household.
Age 40
b. ~1900
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Maryland |
| Surname | Nicholson |
| Given Name | John W |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Halpine |
| Additional Details | |
| Occupation | Janitor |
| Industry | Apt House |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 740 |
| Highest Grade | 6 |
| 1935 Residence | Same Place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Janitor |
| Township / Ward | Halpine |
| Est. Birth Year | ~1900 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| J Nicholson | Son | — | 32 | ~1908 |
| John Nicholson | Head | — | 72 | ~1868 |
| Sarah Nicholson | Spouse | — | 61 | ~1879 |
| John Nicholson | Son | — | 40 | ~1900 |
Census Appearances
1920
Montgomery, Maryland
Son, age 20
Montgomery, Maryland · implied b. ~1900 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nicholson |
| Given Name | John N |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Home Farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Montgomery, Maryland
Son, age 30
Montgomery, Maryland · implied b. ~1900 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nicholson |
| Given Name | John R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| 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
Montgomery-County, Maryland
Son, age 40
Montgomery-County, Maryland · implied b. ~1900 — 4 household members
| Surname | Nicholson |
| Given Name | John W |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Halpine |
| Occupation | Janitor |
| Industry | Apt House |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 740 |
| Highest Grade | 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 Nicholson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Nicholson (~0.92 confidence) and mother Sara Nicholson (~0.92 confidence) and mother Sarah Nicholson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Nicholson
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Sara Nicholson
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Sarah Nicholson
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Nicholson
Son · 1940 · age 40 · b. ~1900 · Maryland
★ You are viewing this record
Sibling
J Nicholson
Sibling · 1940 · age 32
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 — Montgomery-County, Maryland
Open full size
1940 US Federal Census — Montgomery-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01553-00239)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary F Ray | 28 | Wife | — | Maryland |
| 2 | Peggy Ray | 8 | daughter | — | Maryland |
| 3 | Harry Jackson | 30 | Roomer | Clerk | Maryland |
| 4 | Rose Jackson | 29 | Roomer | Saleswoman | Maryland |
| 5 | Leo Festerman | 30 | Head | Caretaker | Virginia |
| 6 | Blanche Festerman | 27 | Wife | — | Maryland |
| 7 | Paul Festerman | 7 | son | — | Maryland |
| 8 | Leonard Festerman | 4 | son | — | Maryland |
| 9 | Barbara A Festerman | 2 | daughter | — | Maryland |
| 10 | Ray Dickerson | 12 | nephew | — | Virginia |
| 11 | Ralph Dickerson | 10 | nephew | — | Maryland |
| 12 | Thos B Blatton | 33 | Head | Truck Driver | Maryland |
| 13 | Laura Blatton | 33 | Wife | — | Maryland |
| 14 | Jane Blatton | 2 | daughter | — | Maryland |
| 15 | Mary Ann Blatton | 3 | daughter | — | Maryland |
| 16 | Harry Blatton | 2 | son | — | Maryland |
| 17 | Mary Schultze | 78 | Head | — | West Va |
| 18 | Thos Borsch | 30 | Roomer | Nursery Man | Virginia |
| 19 | Grace Borsch | 32 | Roomer | — | Maryland |
| 20 | Fred G Schoen | 36 | Head | Machinist | Germany |
| 21 | Leona G Schoen | 36 | Wife | — | N. Ireland |
| 22 | Arthur Harding | 31 | Head | Painter | Maryland |
| 23 | Margery Harding | 31 | Wife | — | Maryland |
| 24 | Margery Ann Harding | 3 | daughter | — | Wash DC |
| 25 | Robt Gladden | 25 | Head | Plumber | Virginia |
| 26 | Ethel Gladden | 25 | Wife | Saleswoman | Virginia |
| 27 | Nelson Burroughs | 40 | Head | Laborer | Maryland |
| 28 | Laura Burroughs | 35 | Wife | — | Virginia |
| 29 | Arthur Elliott | 36 | Head | Laborer | Maryland |
| 30 | Ruby G Elliott | 19 | Wife | — | Michigan |
| 31 | Anna L Elliott | 10 | daughter | — | Maryland |
| 32 | Lillian R Elliott | 10 | daughter | — | Maryland |
| 33 | Joshua R Elliott | 4 | daughter | — | Maryland |
| 34 | John R Nicholson | 72 | Head | Watchman | Maryland |
| 35 | Sarah Nicholson | 61 | Wife | — | Maryland |
| 36 | John W Nicholson THIS PERSON | 40 | son | Janitor | Maryland |
| 37 | J. Russell Nicholson | 32 | son | Newspaper | Maryland |
| 38 | Geo G Book | 51 | Head | Driver | Maryland |
| 39 | Emma Book | 26 | Wife | — | Maryland |
| 40 | Henry Weaver | 58 | Head | Traffic Director | Maryland |
Related Census Records
Pedigree Summary
John + 1 sibling
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)