SD
Sarah Davis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Sarah Davis across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Mary & Mary — first a daughter (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Davis |
| Given Name | Sarah F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Concord |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Instructor |
| Industry | Private School |
| Class of Worker | NP |
| Hours Worked | 35 |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Instructor |
| Township / Ward | Concord |
| 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 Sarah | Age | Birth yr |
|---|---|---|---|---|
| Sarah Davis | Daughter | — | 23 | ~1917 |
| Philip Davis | Head | — | 63 | ~1877 |
| Cotta Helin | Other | — | 30 | ~1910 |
| Philip Davis | Son | — | 26 | ~1914 |
| Mary Davis | Spouse | — | 65 | ~1875 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 3
Middlesex, Massachusetts · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Sarah F |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| 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
Daughter, age 13
Middlesex, Massachusetts · implied b. ~1917 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Sarah A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 23
Middlesex-County, Massachusetts · implied b. ~1917 — 5 household members
| Surname | Davis |
| Given Name | Sarah F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Concord |
| 1935 Residence (County) | Middlesex |
| Occupation | Instructor |
| Industry | Private School |
| Class of Worker | NP |
| Hours Worked | 35 |
| Income (1939) | 0 |
| Highest Grade | C 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 Sarah Davis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Davis (~0.92 confidence) and mother Mary Davis (~0.92 confidence) and father Philip Davis (~0.92 confidence) and father Philip Davis (~0.92 confidence) and father Bert Davis (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Davis
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Mary Davis
b. ~1876
Source mother
● Household
· direct · ~0.92
Father
Philip Davis
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Philip Davis
b. ~1878
Source father
● Household
· direct · ~0.92
Father
Bert Davis
b. ~1883
Source father
● Household
· direct · ~0.92
This person
Anchor record
Sarah Davis
Daughter · 1940 · age 23 · b. ~1917 · Massachusetts
★ You are viewing this record
Sibling
Philip Davis
Sibling · 1940 · age 26
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-t0627-01603-00879)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Henry M. Keyes | 36 | Head | Cotton Broker | Massachusetts |
| 2 | Mary N. Keyes | 31 | Wife | — | Massachusetts |
| 3 | Jonathan Keyes | 5 | Son | — | Massachusetts |
| 4 | Henry W. Keyes | 3 | Son | — | Massachusetts |
| 5 | Beatrice Sylvian | 26 | Maid | Maid | New Hampshire |
| 6 | Ann Dotty | 5 | Maid | — | New Hampshire |
| 7 | Alan T. Malcolm | 72 | Head | Superintendent | Canada English |
| 8 | Ada B. Malcolm | 81 | Wife | — | Rhode Island |
| 9 | Clemence Levandier | 40 | Maid | Maid | Canada French |
| 10 | Martin Anderson | 59 | Head | Farmer | Norway |
| 11 | Marie W. Anderson | 62 | Wife | — | Norway |
| 12 | Herman Anderson | 24 | Son | Bookkeeper | Massachusetts |
| 13 | Sherman Hoar | 72 | Head | — | Massachusetts |
| 14 | George Parsons | 45 | Son-in-law | Trustee | Massachusetts |
| 15 | Elizabeth Parsons | 42 | Daughter | — | Massachusetts |
| 16 | W. Todd Parsons | 13 | Grandson | — | Massachusetts |
| 17 | Mary S. Parsons | 10 | Granddaughter | — | Massachusetts |
| 18 | Agnes Burke | 61 | Maid | Maid | Irish Free State |
| 19 | Florence Dillon | 49 | Maid | Maid | New Hampshire |
| 20 | Alyce Mello | 24 | Maid | Maid | Massachusetts |
| 21 | Ole Durand | 50 | Head | Caretaker | Norway |
| 22 | Anna Durand | 51 | Wife | — | Norway |
| 23 | Ralph Durand | 23 | Son | Clerk | Massachusetts |
| 24 | George Macwilliams | 34 | Head | General Man | Massachusetts |
| 25 | R. Mabel Macwilliams | 32 | Wife | Bookkeeper | Massachusetts |
| 26 | Grace B. Keyes | 73 | Head | — | Massachusetts |
| 27 | Marion B. Keyes | 79 | Sister | — | Massachusetts |
| 28 | Mathilda Forgensen | 60 | Maid | Maid | Norway |
| 29 | Arnt K. Olson | 49 | Head | General Man | Norway |
| 30 | Mathilda Olson | 46 | Wife | — | Norway |
| 31 | Hilda Olson | 21 | Daughter | — | Massachusetts |
| 32 | Mildred Olson | 20 | Daughter | — | Massachusetts |
| 33 | Harold Olson | 18 | Son | — | Massachusetts |
| 34 | Hazen Lamson | 46 | Head | Purchasing Agent | Massachusetts |
| 35 | Edna Lamson | 47 | Wife | — | New Hampshire |
| 36 | Philip A. Davis | 63 | Head | Sales Agent | Massachusetts |
| 37 | Mary B. Davis | 65 | Wife | — | Massachusetts |
| 38 | Philip A. Jr. Davis | 26 | Son | Instructor | Massachusetts |
| 39 | Sarah F. Davis THIS PERSON | 23 | Daughter | Instructor | Massachusetts |
| 40 | Cotta Helin | 30 | Maid | Maid | Finland |
Pedigree Summary
Sarah + 1 sibling
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)