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John Shields — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Shields across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents John & Margaret — first a head (b.~1894), then head of a 5-person household.
Age 46
b. ~1894
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Shields |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Everett City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Iron Work |
| Industry | Iron manufacture |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1300 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Iron Work |
| Township / Ward | Everett City |
| Est. Birth Year | ~1894 |
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 |
|---|---|---|---|---|
| Audrey Shields | Daughter | — | 11 | ~1929 |
| Marlene Shields | Daughter | — | 16 | ~1924 |
| John Shields | Head | — | 46 | ~1894 |
| Mary Shields | Spouse | — | 39 | ~1901 |
| Margery Shields | Daughter | — | 14 | ~1926 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 23
Middlesex, Massachusetts · implied b. ~1897 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shields |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | Brick Yard |
| 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
Head, age 31
Middlesex, Massachusetts · implied b. ~1899 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shields |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 20 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Iron Worker |
| Industry | Contractor |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25.00 |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 46
Middlesex-County, Massachusetts · implied b. ~1894 — 5 household members
| Surname | Shields |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Everett City |
| 1935 Residence (County) | Middlesex |
| Occupation | Iron Work |
| Industry | Iron manufacture |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1300 |
| 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 John Shields across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Shields (~0.92 confidence) and mother Margaret Shields (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Shields
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Margaret Shields
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Shields
Head · 1940 · age 46 · b. ~1894 · 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
40 people indexed on this census page (nara:1940:m-t0627-01605-00382)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joseph P. Heath | 63 | Head | Director | England |
| 42 | Laura Heath | 61 | Wife | — | England |
| 43 | Allan J. Heath | 20 | Son | New Worker | Massachusetts |
| 44 | Frances H. Hardeman | 19 | Lodger | — | Massachusetts |
| 45 | Robert W. Lane | 40 | Head | Teller | Massachusetts |
| 46 | Evelyn V. Lane | 29 | Wife | — | New York |
| 47 | Virginia R. Lane | 1 | Daughter | — | Massachusetts |
| 48 | John J. Shields THIS PERSON | 46 | Head | Iron Work | Massachusetts |
| 49 | Mary A. Shields | 39 | Wife | Box Worker | Massachusetts |
| 50 | Marlene R. Shields | 16 | Daughter | — | Massachusetts |
| 51 | Margery M. Shields | 14 | Daughter | — | Massachusetts |
| 52 | Audrey R. Shields | 11 | Daughter | — | Massachusetts |
| 53 | Robert J. Gerety | 41 | Head | Policeman | Massachusetts |
| 54 | Florence E. Gerety | 39 | Wife | — | Massachusetts |
| 55 | Robert J. Gerety | 9 | Son | — | Massachusetts |
| 56 | Jeanne Gerety | 8 | Daughter | — | Massachusetts |
| 57 | David Gerety | 7 | Son | — | Massachusetts |
| 58 | Roy S. Leav | 26 | Head | Shipper | Tennessee |
| 59 | Hazel S. Leav | 26 | Wife | — | Massachusetts |
| 60 | Adam B. Mc Gowan | 71 | Head | — | Canada |
| 61 | Lorenz E. Mc Gowan | 45 | Son | Office Manager | Massachusetts |
| 62 | Ora V. Mc Gowan | 40 | Daughter | Factory Worker | England |
| 63 | John E. Lawson | 40 | Head | — | Massachusetts |
| 64 | Lillian B. Lawson | 37 | Wife | — | Canada |
| 65 | George F. St. Pierre | 59 | Head | Hairdresser | Canada |
| 66 | Alice M. St. Pierre | 44 | Wife | — | Vermont |
| 67 | George L. St. Pierre | 25 | Son | Factory Worker | Maine |
| 68 | Raymond A. St. Pierre | 20 | Son | Unloader | Massachusetts |
| 69 | Gloria A. St. Pierre | 14 | Daughter | — | Massachusetts |
| 70 | Clifford A. Parson | 41 | Head | Sales & Service Man | Massachusetts |
| 71 | Nena A. Parson | 39 | Wife | — | Massachusetts |
| 72 | Doris R. Parson | 17 | Daughter | — | Massachusetts |
| 73 | Stanley C. Parson | 16 | Son | — | Massachusetts |
| 74 | Betty J. Parson | 4 | Daughter | — | Massachusetts |
| 75 | Winifred B. Parson | 68 | Mother | Housework | Massachusetts |
| 76 | John K. Herlihy | 43 | Head | Foreman | New Hampshire |
| 77 | Edna N. Herlihy | 40 | Wife | — | Massachusetts |
| 78 | Mary J. Herlihy | 14 | Daughter | — | Massachusetts |
| 79 | Francis J. Herlihy | 12 | Son | — | Massachusetts |
| 80 | John K. Herlihy | 11 | Son | — | Massachusetts |
Pedigree Summary
John
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)