HJ
Harold Jackson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Harold Jackson across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Simon & Louise — first a head (b.~1905), then head of a 4-person household.
Age 35
b. ~1905
Male
Head
Born: England
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Jackson |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Alien |
| Additional Details | |
| Occupation | Chemical Engineer |
| Industry | Chemical Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1140 |
| Highest Grade | Hs 4 |
| 1935 Residence | Massachusetts |
| Birth Country | England |
| Birthplace (normalized) | england |
| Occupation | Chemical Engineer |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1905 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Thelma Jackson | Spouse | — | 31 | ~1909 |
| Harold Jackson | Head | — | 35 | ~1905 |
| Jack Jackson | Son | — | 12 | ~1928 |
| Richard Jackson | Son | — | 8 | ~1932 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 14
Suffolk, Massachusetts · implied b. ~1906 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jackson |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | England |
| Year of Immigration | 1907 |
| Naturalization Status | Naturalized |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Year of Naturalization | 1919 |
| Birthplace (normalized) | england |
1930
Suffolk, Massachusetts
Son, age 24
Suffolk, Massachusetts · implied b. ~1906 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jackson |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1906 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Draftsman |
| Industry | Electric |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Middlesex-County, Massachusetts
Head, age 35
Middlesex-County, Massachusetts · implied b. ~1905 — 4 household members
| Surname | Jackson |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Alien |
| Occupation | Chemical Engineer |
| Industry | Chemical Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1140 |
| Highest Grade | Hs 4 |
| 1935 Residence | Massachusetts |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Harold Jackson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Simon Jackson (~0.92 confidence) and mother Louise Jackson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Simon Jackson
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Louise Jackson
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Jackson
Head · 1940 · age 35 · b. ~1905 · 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
39 people indexed on this census page (nara:1940:m-t0627-01705-00444)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Paes | 32 | Wife | — | Massachusetts |
| 43 | Carl B. Lovequist | 47 | Head | Bus Operator | Missouri |
| 44 | Ruth M. Lovequist | 44 | Sister | Typist | Missouri |
| 45 | Gerda Lovequist | 74 | Mother | — | Sweden |
| 46 | William J. Daly | 66 | Head | — | Eire |
| 47 | Margaret Daly | 66 | Wife | — | Eire |
| 48 | William F. Daly | 34 | Son | Steel Worker | Massachusetts |
| 49 | Thomas Matheray | 29 | Nephew | Laborer | Massachusetts |
| 50 | George A. Newell | 67 | Head | — | Canada-English |
| 51 | Stella Newell | 67 | Wife | — | Canada-English |
| 52 | George H. Foster | 22 | Boarder | Tester | Massachusetts |
| 53 | Harold Jackson THIS PERSON | 35 | Head | Chemical Engineer | England |
| 54 | Thelma Jackson | 31 | Wife | — | Massachusetts |
| 55 | Jack Jackson | 12 | Son | — | Massachusetts |
| 56 | Richard Jackson | 8 | Son | — | Massachusetts |
| 57 | William Collins | 37 | Head | Post Office Clerk | Massachusetts |
| 58 | Helen R. Collins | 28 | Wife | — | Massachusetts |
| 59 | William Collins | 4 | Son | — | Massachusetts |
| 60 | Dorothy M. Noonan | 24 | Sister-in-law | Salesclerk | Massachusetts |
| 61 | Edward Noonan | 21 | Brother-in-law | Salesclerk | Massachusetts |
| 62 | Thomas Bowe | 40 | Head | Bus Operator | Massachusetts |
| 63 | Clara Bowe | 38 | Wife | — | Massachusetts |
| 64 | Joseph Mello | 49 | Head | Barber | Portugal |
| 65 | Elizabeth Mello | 47 | Wife | Maid | Massachusetts |
| 66 | Muriel Mello | 20 | Daughter | Assembly Work | Massachusetts |
| 67 | Joseph Mello | 18 | Son | — | Massachusetts |
| 68 | James Gorden | 23 | Lodger | — | Massachusetts |
| 69 | Patrick J. Staples | 43 | Head | Electrician | Canada-English |
| 70 | Mary D. Staples | 45 | Wife | — | Canada-English |
| 71 | Margaret Staples | 6 | Daughter | — | Massachusetts |
| 72 | Leroy L. Ricker | 50 | Head | Canvassing Salesman | Maine |
| 73 | Nancy L. Ricker | 50 | Wife | — | Massachusetts |
| 74 | Roy L. Cole | 54 | Head | Steward | Massachusetts |
| 75 | Grace M. Cole | 54 | Wife | — | New Hampshire |
| 76 | Elizabeth M. Hill | 77 | Mother-in-law | — | New Hampshire |
| 77 | Alfred Youder | 46 | Head | Chauffeur | Canada-English |
| 78 | Rita Youder | 43 | Wife | — | Canada-English |
| 79 | Clayton Youder | 15 | Son | — | Massachusetts |
| 80 | Irene Youder | 13 | Daughter | — | Massachusetts |
Pedigree Summary
Harold
Gen 1 · 2 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)