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Bertha Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Napa-County, California
Our Model Tree links this Bertha Nelson across the 1920, 1930 and 1940 US Censuses in Napa-County, California (XGBoost, ~Confirmed), with identified parents William & William — first a daughter (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Napa-County, California |
| Surname | Nelson |
| Given Name | Bertha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Napa City |
| 1935 Residence (County) | Napa |
| Additional Details | |
| Occupation | Hemmer |
| Industry | Garment Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 936 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Hemmer |
| Township / Ward | Napa City |
| Est. Birth Year | ~1917 |
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 Bertha | Age | Birth yr |
|---|---|---|---|---|
| William Nelson | Head | — | 52 | ~1888 |
| Florence Nelson | Daughter | — | 17 | ~1923 |
| Ivana Nelson | Spouse | — | 48 | ~1892 |
| Bertha Nelson | Daughter | — | 23 | ~1917 |
| Lawrence Nelson | Son | — | 17 | ~1923 |
Census Appearances
1920
Napa, California
Daughter, age 4
Napa, California · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Bertha L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Napa, California
Daughter, age 13
Napa, California · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Bertha L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Napa-County, California
Daughter, age 23
Napa-County, California · implied b. ~1917 — 5 household members
| Surname | Nelson |
| Given Name | Bertha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Napa City |
| 1935 Residence (County) | Napa |
| Occupation | Hemmer |
| Industry | Garment Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 936 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Bertha Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Nelson (~0.92 confidence) and father William Nelson (~0.92 confidence) and father William Nelson (~0.92 confidence) and mother Irene Nelson (~0.92 confidence) and mother Ivana Nelson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Nelson
b. ~1885
Source father
● Household
· direct · ~0.92
Father
William Nelson
b. ~1888
Source father
● Household
· direct · ~0.92
Father
William Nelson
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Irene Nelson
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Ivana Nelson
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Bertha Nelson
Daughter · 1940 · age 23 · b. ~1917 · California
★ You are viewing this record
Sibling
Florence Nelson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Nelson
Sibling · 1940 · age 17
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 — Napa-County, California
Open full size
1940 US Federal Census — Napa-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00269-00273)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Katherine Goert | 68 | Head | 0 | Kansas |
| 2 | Adele Kessner | 90 | Mother | 0 | Ohio |
| 3 | William H. Nelson | 52 | Head | Tanner | Illinois |
| 4 | Ivana Nelson | 48 | Wife | Presser | Illinois |
| 5 | Bertha Nelson THIS PERSON | 23 | Daughter | Hemmer | California |
| 6 | Lawrence Nelson | 17 | Son | Garden Work | California |
| 7 | Florence Nelson | 17 | Daughter | 0 | California |
| 8 | J. E. Tollestrup | 26 | Head | Roofer | Utah |
| 9 | Alice Tollestrup | 22 | Wife | 0 | Utah |
| 10 | Dean J. Tollestrup | 1 | Son | — | California |
| 11 | Steven R. Tollestrup | 0 | Son | — | Utah |
| 12 | John B. Baggiali | 28 | Head | Baker | California |
| 13 | Mary Baggiali | 24 | Wife | 0 | California |
| 14 | Joanne Baggiali | 1 | Daughter | — | California |
| 15 | A. O. Thomasson | 37 | Head | Attendant | California |
| 16 | Maude Thomasson | 32 | Wife | 0 | California |
| 17 | James Thomasson | 7 | Son | — | California |
| 18 | Jean Thomasson | 5 | Daughter | — | California |
| 19 | Albert Cliffe | 57 | Head | Owner | England |
| 20 | Madeline Cliffe | 57 | Wife | 0 | England |
| 21 | Victor Cliffe | 23 | Son | Laborer | California |
| 22 | Cristian Prescott | 27 | Head | Machinist | Pennsylvania |
| 23 | Iva S. Prescott | 28 | Wife | 0 | California |
| 24 | Christian Prescott | 7 | Son | — | California |
| 25 | Charles Prescott | 1 | Daughter | — | California |
| 26 | Roland Richter | 70 | Head | Laborer | California |
| 27 | Mary Richter | 68 | Wife | 0 | Ohio |
| 28 | G. N. Bradley | 61 | Head | Naval Officer | Missouri |
| 29 | Eva Bradley | 54 | Wife | 0 | Missouri |
| 30 | Edwin S. Bradley | 19 | Son | 0 | Virginia |
| 31 | Roy De Garmo | 57 | Head | Carpenter | Ohio |
| 32 | Harriet De Garmo | 52 | Wife | Matron | Pennsylvania |
| 33 | Robert De Garmo | 17 | Son | 0 | California |
| 34 | Roger De Garmo | 16 | Son | Delivery Boy | California |
| 35 | Ralph De Garmo | 11 | Son | — | California |
| 36 | Richard De Garmo | 9 | Son | — | California |
| 37 | Camillo Rota | 48 | Head | Janitor | Italy |
| 38 | Amelia Rota | 40 | Wife | 0 | California |
| 39 | Warren Rota | 17 | Son | Delivery Boy | California |
| 40 | Ernest Rota | 15 | Son | Delivery Boy | California |
Pedigree Summary
Bertha + 2 siblings
Gen 1 · 5 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)