LA
Leonard Anderson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Leonard Anderson across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Alfred & Alfred — first a son (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Anderson |
| Given Name | Leonard H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Laborer |
| Industry | Grocery Store |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 100 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Laborer |
| Township / Ward | Malden 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 Leonard | Age | Birth yr |
|---|---|---|---|---|
| Carroll Anderson | Son | — | 25 | ~1915 |
| Leonard Anderson | Son | — | 23 | ~1917 |
| Marshall Anderson | Son | — | 21 | ~1919 |
| Christina Anderson | Spouse | — | 57 | ~1883 |
| Alfred Anderson | Head | — | 69 | ~1871 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 2
Middlesex, Massachusetts · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Leonard L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 13
Middlesex, Massachusetts · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Leonard L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 23
Middlesex-County, Massachusetts · implied b. ~1917 — 5 household members
| Surname | Anderson |
| Given Name | Leonard H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden City |
| 1935 Residence (County) | Middlesex |
| Occupation | Laborer |
| Industry | Grocery Store |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 100 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| 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 Leonard Anderson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Alfred Anderson (~0.92 confidence) and father Alfred Anderson (~0.92 confidence) and father Alfred Anderson (~0.92 confidence) and mother Christina Anderson (~0.92 confidence) and mother Christina Anderson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alfred Anderson
b. ~1871
Source father
● Household
· direct · ~0.92
Father
Alfred Anderson
b. ~1871
Source father
● Household
· direct · ~0.92
Father
Alfred Anderson
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Christina Anderson
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Christina Anderson
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Leonard Anderson
Son · 1940 · age 23 · b. ~1917 · Massachusetts
★ You are viewing this record
Sibling
Carroll Anderson
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marshall Anderson
Sibling · 1940 · age 21
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-t0627-01609-00381)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Seward J Macdonald | 32 | Head | Baker | Canada-English |
| 2 | Ella Macdonald | 27 | Wife | — | Massachusetts |
| 3 | Harold Macdonald | 6 | Son | — | Massachusetts |
| 4 | Elizabeth Macdonald | 5 | Daughter | — | Massachusetts |
| 5 | Seward J Macdonald | 3 | Son | — | Massachusetts |
| 6 | Sandra J Macdonald | 2 | Daughter | — | Massachusetts |
| 7 | Alexander Sutherland | 18 | State ward | Baker'S Helper | Massachusetts |
| 8 | Fritz A Olson | 29 | Head | Lineman | Massachusetts |
| 9 | Edna S Olson | 32 | Wife | — | Massachusetts |
| 10 | Joan Olson | 5 | Daughter | — | Massachusetts |
| 11 | Carol A Olson | 4 | Daughter | — | Massachusetts |
| 12 | Janet Olson | 2 | Daughter | — | Massachusetts |
| 13 | Fritz A Olson | 55 | Head | Toolmaker | Sweden |
| 14 | Ellen K Olson | 58 | Wife | — | Sweden |
| 15 | Carl R Olson | 24 | Son | Asphalt Mixer | Massachusetts |
| 16 | Axel Olson | 24 | Son | Laborer | Massachusetts |
| 17 | Florence Olson | 22 | Daughter | File Clerk | Massachusetts |
| 18 | Alfred Anderson | 69 | Head | Laborer | Sweden |
| 19 | Christina A Anderson | 57 | Wife | — | Sweden |
| 20 | Carroll A Anderson | 25 | Son | Clerk | Massachusetts |
| 21 | Leonard H Anderson THIS PERSON | 23 | Son | Laborer | Massachusetts |
| 22 | Marshall E Anderson | 21 | Son | Laborer | Massachusetts |
| 23 | Jennie Dyreson | 48 | Head | Keeper | Norway |
| 24 | Herman Mortensen | 48 | Lodger | Plumber | Denmark |
| 25 | August Johnson | 35 | Lodger | Carpenter | Sweden |
| 26 | Clayton Mortensen | 23 | Lodger | Plumber'S Helper | Ohio |
| 27 | Ludwig Bergerson | 34 | Lodger | Carpenter | Sweden |
| 28 | Sven Johnson | 35 | Lodger | Carpenter | Sweden |
| 29 | Joseph Lecaroz | 28 | Head | Truck Driver | Canada-English |
| 30 | Anna Lecaroz | 29 | Wife | — | Massachusetts |
| 31 | John F Lecaroz | 4 | Son | — | Massachusetts |
| 32 | Joseph E Lecaroz | 3 | Son | — | Massachusetts |
| 33 | Rudolph W Nelson | 32 | Head | Owner Proprietor | Massachusetts |
| 34 | Violette Nelson | 28 | Wife | — | Rhode Island |
| 35 | Nellie Spinney | 60 | Head | — | Canada-English |
| 36 | Alice Spinney | 20 | Daughter | Counter Girl | Canada-English |
| 37 | Carl Spinney | 17 | Son | — | Canada-English |
| 38 | Verta Spinney | 15 | Daughter | — | Canada-English |
| 39 | Bevington Savage | 75 | Head | — | Eire |
| 40 | Kathleen Savage | 72 | Wife | — | Eire |
Pedigree Summary
Leonard + 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)