CD
Charles Day — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Charles Day across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Harry & Anna — first a son (b.~1914), then head of a 3-person household.
Age 26
b. ~1914
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Day |
| Given Name | Charles F |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden (city) |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | buyer |
| Industry | retail clothing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 950 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Buyer |
| Township / Ward | Malden City |
| Est. Birth Year | ~1914 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Charles | Age | Birth yr |
|---|---|---|---|---|
| Harry Day | Head | — | 59 | ~1881 |
| Anna Day | Spouse | — | 50 | ~1890 |
| Charles Day | Son | — | 26 | ~1914 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 6
Middlesex, Massachusetts · implied b. ~1914 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | Charles J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 16
Middlesex, Massachusetts · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 26
Middlesex-County, Massachusetts · implied b. ~1914 — 3 household members
| Surname | Day |
| Given Name | Charles F |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden (city) |
| 1935 Residence (County) | Middlesex |
| Occupation | buyer |
| Industry | retail clothing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 950 |
| Highest Grade | Hs 4 |
| 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 Charles Day across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Day (~0.92 confidence) and mother Anna Day (~0.92 confidence) and mother Anna Day (~0.92 confidence) and father Harry Day (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Day
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Anna Day
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Anna Day
b. ~1892
Source mother
● Household
· direct · ~0.92
Father
Harry Day
b. ~1892
Source father
● Household
· direct · ~0.92
This person
Anchor record
Charles Day
Son · 1940 · age 26 · b. ~1914 · Massachusetts
★ You are viewing this record
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
38 people indexed on this census page (nara:1940:m-t0627-01609-00283)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Loren Fritz | 24 | son | Locksmith | Massachusetts |
| 42 | Doris Fritz | 19 | dau | Clk | Massachusetts |
| 43 | Lester G Crawford | 39 | head | Electrician | Massachusetts |
| 44 | Mary B Crawford | 35 | wife | — | Massachusetts |
| 45 | Lester G Crawford | 4 | son | — | Massachusetts |
| 46 | Harold E Crawford | 1 | son | — | Massachusetts |
| 47 | Thomas Lee | 12 | foster son | — | England |
| 48 | Frank Adams | 58 | head | Laborer | Italy |
| 49 | Rose Adams | 57 | wife | — | Italy |
| 50 | Salvatore Cambriello | 24 | son-in-law | Washer | Massachusetts |
| 51 | Mary Cambriello | 21 | dau | — | Massachusetts |
| 52 | Carl C Harper | 40 | head | Manager | Canada |
| 53 | Sarah Harper | 39 | wife | — | Massachusetts |
| 54 | Thelma Harper | 17 | daughter | — | Massachusetts |
| 55 | John N Harper | 65 | head | Meat Cutter | England |
| 56 | Mary A Harper | 62 | wife | — | England |
| 57 | Harry S Day | 59 | head | Custodian | Massachusetts |
| 58 | Anna M Day | 50 | wife | Manager | Massachusetts |
| 59 | Charles F Day THIS PERSON | 26 | son | Buyer | Massachusetts |
| 61 | Peter Prusak | 29 | head | Clerk Supervisor | Massachusetts |
| 62 | Yvette Prusak | 27 | wife | — | Massachusetts |
| 63 | Clarence J Green | 29 | head | Mechanic | Washington |
| 64 | Nellie B Green | 28 | wife | — | Massachusetts |
| 65 | Clarence R Green | 2 | son | — | Massachusetts |
| 66 | James F Fitzgerald | 41 | head | Electrical Engineer | Ireland |
| 67 | Elizabeth Fitzgerald | 34 | wife | — | Massachusetts |
| 68 | Margaret M Fitzgerald | 5 | daughter | — | Massachusetts |
| 70 | Frank P Splitz | 31 | head | Machinist | Massachusetts |
| 71 | Antoinette Splitz | 32 | wife | — | Massachusetts |
| 72 | Virginia Splitz | 2 | daughter | — | Massachusetts |
| 73 | Winfield Barker | 53 | head | Bank Clerk | Maine |
| 74 | Robert W Cole | 27 | lodger | Instructor | Indiana |
| 75 | Arlene Sheehan | 36 | head | Weigher | Massachusetts |
| 76 | Annie Sheehan | 34 | sister | Forelady | Massachusetts |
| 77 | Henry P Bruce | 58 | head | Shipping Salesman | Massachusetts |
| 78 | Martha M Bruce | 58 | wife | — | Massachusetts |
| 79 | Leah D Brayton | 40 | daughter | — | Maine |
| 80 | Jean B Brayton | 11 | daughter | — | Massachusetts |
Pedigree Summary
Charles
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)