WC
William Carlson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kings-County, New York
Our Model Tree links this William Carlson across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed), with identified parents Charles & Henry — first a son (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Clerk |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 1100 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Clerk |
| Township / Ward | New York 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Jane Carlson | Daughter | — | 23 | ~1917 |
| William Carlson | Son | — | 22 | ~1918 |
| Arthur Carlson | Son | — | 30 | ~1910 |
| Bertha Carlson | Other | — | 64 | ~1876 |
| Henry Carlson | Head | — | 31 | ~1909 |
| Franklin Carlson | Son | — | 25 | ~1915 |
Census Appearances
1920
Kings, New …
Son, age 2
Kings, New York · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Karlson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Sweden |
| Mother's Birthplace | New York |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Kings, New …
Son, age 12
Kings, New York · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Sweden |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Son, age 22
Kings-County, New York · implied b. ~1918 — 6 household members
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Occupation | Clerk |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 1100 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 William Carlson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Carlson (~0.92 confidence) and father Henry Carlson (~0.60 confidence) and father Knut Karlson (~0.92 confidence) and mother Adele Karlson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.84
Father
Charles Carlson
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Henry Carlson
b. ~1909
Source father
● Household
· direct · ~0.6
Father
Knut Karlson
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Adele Karlson
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Carlson
Son · 1940 · age 22 · b. ~1918 · New York
★ You are viewing this record
Sibling
Arthur Carlson
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Franklin Carlson
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jane Carlson
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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02551-00679)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Howard Ledbetter | 16 | Son | — | Florida |
| 42 | Milton Ledbetter | 14 | Son | — | Florida |
| 43 | Lorraine Ledbetter | 11 | Daughter | — | Florida |
| 44 | Paul Lane | 31 | Head | Bus-Driver | South Carolina |
| 45 | Constance B. Lane | 25 | Wife | — | New York |
| 46 | Paul Jr. Lane | 3 | Son | — | New York |
| 47 | Barbara Lane | 1 | Daughter | — | New York |
| 48 | Kenneth D. Krueger | 36 | Head | Collector | Minnesota |
| 49 | Melvina Krueger | 35 | Wife | Clerk | New York |
| 50 | Howard C. Rovelle | 44 | Head | Printer | New York |
| 51 | Betty M. Rovelle | 39 | Wife | — | New York |
| 52 | Dorothy Rovelle | 18 | Daughter | — | New York |
| 53 | Dolores Rovelle | 9 | Daughter | — | New York |
| 54 | Rudolph A. Larson | 46 | Head | Steward Commissary | New York |
| 55 | Rosalie F. Larson | 45 | Wife | — | New York |
| 56 | Lenore R. Larson | 13 | Daughter | — | New York |
| 57 | Fred L. Sayles | 57 | Head | Weighmaster | New Jersey |
| 58 | Mary E. Sayles | 58 | Wife | — | New York |
| 59 | Richard L. Sayles | 35 | Son | Store-Keeper | New York |
| 60 | Vito Piche | 55 | Head | Ice-Man | Italy |
| 61 | Mary Piche | 45 | Wife | — | Italy |
| 62 | Frank Piche | 26 | Son | Chauffeur | New York |
| 63 | Isabelle Piche | 16 | Daughter | — | New York |
| 64 | Joseph Piche | 13 | Son | — | New York |
| 65 | Frank Casaruri | 76 | Brother-in-law | — | Italy |
| 66 | Niels Nelson | 51 | Head | Elevator Repair | Denmark |
| 67 | Maria Nelson | 55 | Wife | — | Sweden |
| 68 | Sam Loyd | 30 | Head | Commanding Officer | New York |
| 69 | Rose Loyd | 31 | Wife | Teacher | New York |
| 70 | Patricia Loyd | 7 | Daughter | — | New York |
| 71 | Nancy Loyd | 5 | Daughter | — | New York |
| 72 | Francis Johnson | 54 | Head | Patrolman | New York |
| 73 | Isabelle Johnson | 53 | Wife | — | New York |
| 74 | Malvina Maher | 75 | Mother-in-law | — | New York |
| 75 | Henry Carlson | 31 | Head | Electrician | New York |
| 76 | Bertha Carlson | 64 | Mother | — | Sweden |
| 77 | Arthur Carlson | 30 | Son | Electrician | New York |
| 78 | Franklin Carlson | 25 | Son | Office-Clerk | New York |
| 79 | Jane Carlson | 23 | Daughter | Typist | New York |
| 80 | William Carlson THIS PERSON | 22 | Son | Clerk | New York |
Pedigree Summary
William + 3 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)