BK
Bertha King — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Bertha King across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Arthur & Mary — first a daughter (b.~1910), then head of a 7-person household.
Age 30
b. ~1910
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | King |
| Given Name | Bertha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Melrose City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 1200 |
| Highest Grade | C-3 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Teacher |
| Township / Ward | Melrose City |
| Est. Birth Year | ~1910 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Bertha | Age | Birth yr |
|---|---|---|---|---|
| Mary King | Spouse | — | 60 | ~1880 |
| Louise King | Other | — | 86 | ~1854 |
| Helena King | Daughter | — | 23 | ~1917 |
| Nelson King | Son | — | 28 | ~1912 |
| Arthur King | Head | — | 57 | ~1883 |
| Priscilla King | Other | — | 26 | ~1914 |
| Bertha King | Daughter | — | 30 | ~1910 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 9
Middlesex, Massachusetts · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | King |
| Given Name | Bertha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 19
Middlesex, Massachusetts · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | King |
| Given Name | Bettina H |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 30
Middlesex-County, Massachusetts · implied b. ~1910 — 7 household members
| Surname | King |
| Given Name | Bertha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Melrose City |
| 1935 Residence (County) | Middlesex |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 1200 |
| Highest Grade | C-3 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 King across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Arthur King (~0.92 confidence) and mother Mary King (~0.92 confidence) and mother Mary King (~0.92 confidence) and mother Mary King (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Arthur King
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Mary King
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Mary King
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Mary King
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Bertha King
Daughter · 1940 · age 30 · b. ~1910 · Massachusetts
★ You are viewing this record
Sibling
Nelson King
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helena King
Sibling · 1940 · age 23
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01613-00526)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur R. Swain | 53 | Head | Proprietor | Massachusetts |
| 2 | Anna B. Swain | 49 | Wife | Assistant | Massachusetts |
| 3 | Doris Swain | 25 | Daughter | Assistant | Massachusetts |
| 4 | Albert Brophy | 72 | Patient | — | Ireland |
| 5 | Frederick Taylor | 79 | Patient | — | Massachusetts |
| 6 | George Watkins | 70 | Patient | — | Massachusetts |
| 7 | Henry Hombel | 84 | Patient | — | Massachusetts |
| 8 | Harriet Pingle | 65 | Patient | — | Massachusetts |
| 9 | George Doherty | 54 | Patient | — | Massachusetts |
| 10 | Judson Palmer | 81 | Patient | — | Maine |
| 11 | Cecelia Palmer | 83 | Patient | — | Maine |
| 12 | Frances Lucy Howard | 84 | Patient | — | Montana |
| 13 | Annie Greason | 80 | Patient | — | Massachusetts |
| 14 | Annie Miller | 65 | Patient | — | Massachusetts |
| 15 | William Brunswicker | 49 | Head | Electrician-Maintenance | Massachusetts |
| 16 | Frances Brunswicker | 43 | Wife | Sitter | Massachusetts |
| 17 | Alfred Brunswicker | 19 | Son | — | Massachusetts |
| 18 | Stanley G. Bunker | 38 | Head | Book-Keeper | Massachusetts |
| 19 | Sarah Bunker | 37 | Wife | — | Massachusetts |
| 20 | Priscilla Bunker | 14 | Daughter | — | Massachusetts |
| 21 | Frances Bunker | 10 | Daughter | — | Massachusetts |
| 22 | William Lunnin | 61 | Head | Tool-Maker | Connecticut |
| 23 | Helen Lunnin | 66 | Wife | — | Massachusetts |
| 24 | John Good | 28 | Head | Shipper | Maine |
| 25 | Ruth Good | 25 | Wife | — | Massachusetts |
| 26 | Arthur D. King | 57 | Head | Welfare Engineer | Illinois |
| 27 | Mary H. King | 60 | Wife | — | Massachusetts |
| 28 | Bertha King THIS PERSON | 30 | Daughter | Teacher | Massachusetts |
| 29 | Nelson King | 28 | Son | Osteopathic Physician | Massachusetts |
| 30 | Priscilla King | 26 | Daughter-in-law | Hospital Technician | Massachusetts |
| 31 | Helena King | 23 | Daughter | Secretary | Massachusetts |
| 32 | Louise A. King | 86 | Mother | — | Massachusetts |
| 33 | Gideon Wells | 58 | Head | Machinist | Vermont |
| 34 | Emily Wells | 53 | Wife | — | New York |
| 35 | Edna Wells | 13 | Daughter | — | Massachusetts |
| 36 | John J. Breslin | 55 | Head | Postal Inspector | Massachusetts |
| 37 | Ellen Breslin | 50 | Wife | — | Massachusetts |
| 38 | Dorothea Breslin | 23 | Daughter | Secretary | Massachusetts |
| 39 | David Breslin | 18 | Son | — | Massachusetts |
| 40 | Cora B. Nickerson | 50 | Head | — | Nova Scotia |
Related Census Records
Pedigree Summary
Bertha + 2 siblings
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)