JH
John Holt — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Holt across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1904), then head of a 5-person household.
Age 36
b. ~1904
Male
Son
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | HOLT |
| Given Name | JOHN Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Maintenance Helper |
| Industry | Private Business |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 960 |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Maintenance Helper |
| Township / Ward | Lowell |
| Est. Birth Year | ~1904 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Loretta Holt | Daughter | — | 29 | ~1911 |
| Mary Holt | Spouse | — | 67 | ~1873 |
| John Holt | Son | — | 36 | ~1904 |
| John Holt | Head | — | 65 | ~1875 |
| George Holt | Son | — | 37 | ~1903 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 16
Middlesex, Massachusetts · implied b. ~1904 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Holt |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Salesman |
| Industry | Grocery Store |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 26
Middlesex, Massachusetts · implied b. ~1904 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Holt |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Irish Free State |
| Occupation | Machinist |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 36
Middlesex-County, Massachusetts · implied b. ~1904 — 5 household members
| Surname | HOLT |
| Given Name | JOHN Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell |
| 1935 Residence (County) | Middlesex |
| Occupation | Maintenance Helper |
| Industry | Private Business |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 960 |
| Highest Grade | No 7 |
| 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 John Holt across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Holt (~0.92 confidence) and father John Holt (~0.92 confidence) and mother Mary Holt (~0.92 confidence) and mother Mary Holt (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Holt
b. ~1875
Source father
● Household
· direct · ~0.92
Father
John Holt
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Mary Holt
b. ~1872
Source mother
● Household
· direct · ~0.92
Mother
Mary Holt
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Holt
Son · 1940 · age 36 · b. ~1904 · Massachusetts
★ You are viewing this record
Sibling
George Holt
Sibling · 1940 · age 37
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Loretta Holt
Sibling · 1940 · age 29
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-t0627-01692-00367)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Jr Camp | 20 | Son | New Worker | Massachusetts |
| 2 | William Hamblin | 53 | Head | Operator | England |
| 3 | Clara Hamblin | 55 | Wife | Buffer | England |
| 4 | John Hamblin | 12 | Son | — | Massachusetts |
| 5 | George E Heeley | 55 | Head | Silk Warper | England |
| 6 | Florence Heeley | 55 | Wife | — | England |
| 7 | Victor C Illg | 50 | Head | Salesman | Pennsylvania |
| 8 | Catherine E Illg | 47 | Wife | — | Massachusetts |
| 9 | Julia Illg | 23 | Daughter | Packer | Massachusetts |
| 10 | Victor J Illg | 21 | Son | Slasher | Massachusetts |
| 11 | John Illg | 15 | Son | New Worker | Massachusetts |
| 12 | Mary J Walker | 65 | Head | — | England |
| 13 | Lillian M Walker | 33 | Daughter | Clerk | Massachusetts |
| 14 | Arthur P Cossette | 44 | Head | Parcel Post Clerk | Massachusetts |
| 15 | Mary Cossette | 44 | Wife | — | Massachusetts |
| 16 | Virginia Cossette | 11 | Daughter | — | Massachusetts |
| 17 | Dolores Cossette | 8 | Daughter | — | Massachusetts |
| 18 | George Beaulieu | 44 | Head | Druggist | Massachusetts |
| 19 | Alida Beaulieu | 46 | Wife | — | Maine |
| 20 | Paul Beaulieu | 16 | Son | — | Massachusetts |
| 21 | Edward Duffy | 32 | Head | Chauffeur | Massachusetts |
| 22 | Elizabeth Duffy | 28 | Wife | — | Massachusetts |
| 23 | Jacqueline Duffy | 1 | Daughter | — | Massachusetts |
| 24 | Amanda Mackey | 68 | Head | — | Prince Edward Is |
| 25 | George Thibodeau | 54 | Head | Weaver | Canada-French |
| 26 | Pearl Thibodeau | 19 | Daughter | New Worker | Massachusetts |
| 27 | Russell Thibodeau | 15 | Son | — | Massachusetts |
| 28 | Jenive Bead | 42 | Head | — | Scotland |
| 29 | Hilda Martin | 42 | Lodger | — | England |
| 30 | Emma Teny | 52 | Head | House Maid | Canada-French |
| 31 | Victor Teny | 18 | Son | — | Massachusetts |
| 32 | Norman Teny | 12 | Son | — | Massachusetts |
| 33 | Alfred Powers | 20 | Nephew | Truck Driver | Canada-French |
| 34 | John Holt | 65 | Head | — | Massachusetts |
| 35 | Mary Holt | 67 | Wife | — | Ireland |
| 36 | George Holt | 37 | Son | New Worker | Massachusetts |
| 37 | John Jr Holt THIS PERSON | 36 | Son | Maintenance Helper | Massachusetts |
| 38 | Loretta Holt | 29 | Daughter | French Drawer | Massachusetts |
| 39 | John Knutson | 55 | Head | Tailor | Sweden |
| 40 | Anna Knutson | 48 | Wife | — | Sweden |
Pedigree Summary
John + 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)