JG
John Grace — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Grace across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 7-person household.
Age 13
b. ~1927
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Grace |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston CITY |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1927 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Delbert Grace | Son | — | 6 | ~1934 |
| John Grace | Son | — | 13 | ~1927 |
| Robert Grace | Son | — | 5 | ~1935 |
| Catherine Grace | Spouse | — | 40 | ~1900 |
| Arthur Grace | Son | — | 11 | ~1929 |
| Arthur Grace | Head | — | 40 | ~1900 |
| Peter Compton | Other | — | 50 | ~1890 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 3
Suffolk, Massachusetts · implied b. ~1927 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grace |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Age at First Marriage | 1914 |
| Father's Birthplace | Canada English |
| Mother's Birthplace | Canada English |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 13
Suffolk-County, Massachusetts · implied b. ~1927 — 7 household members
| Surname | Grace |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston CITY |
| 1935 Residence (County) | Suffolk |
| Highest Grade | No 5 |
| 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 John Grace across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Grace
Son · 1940 · age 13 · b. ~1927 · Massachusetts
★ You are viewing this record
Sibling
Robert Grace
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arthur Grace
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Delbert Grace
Sibling · 1940 · age 6
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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01666-00401)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Annie M. Maclean | 39 | Lodger | — | Massachusetts |
| 42 | Edward Bonner | 32 | Lodger | Laborer | Massachusetts |
| 43 | Helen Haggard | 38 | Head | Housewife | Ohio |
| 44 | Penelope S. Haggard | 2 | Daughter | — | Massachusetts |
| 45 | Jane Sullivan | 63 | Head | — | Eire |
| 46 | Mabel J. Stackpole | 61 | Head | Proprietor | Maine |
| 47 | Frank Mclean | 69 | Lodger | — | Canada-Eng |
| 48 | Frank Holt | 71 | Lodger | Assistant Supervisor | New Hampshire |
| 49 | Albert Stackpole | 31 | Nephew | Cold Roller | Massachusetts |
| 50 | Robert Glynn | 56 | Head | Watchman | Massachusetts |
| 51 | Arthur Herbert | 64 | Head | Cleaning Up | New Hampshire |
| 52 | Herbert Hickey | 33 | Lodger | Automobile Mechanic | Massachusetts |
| 53 | Ramsford Mckenzie | 48 | Head | Truck Driver | Massachusetts |
| 54 | William Macallister | 33 | Head | Cab Driver | Massachusetts |
| 55 | Gertrude Macallister | 31 | Wife | — | Massachusetts |
| 56 | Alfred Munroe | 72 | Head | — | Sweden |
| 57 | Karl J. Munroe | 58 | Head | Caretaker | Canada-Eng |
| 58 | Annie C. Caughlin | 30 | Head | — | Massachusetts |
| 59 | Maria E. Sheridan | 27 | Sister | Cigar Maker Operator | Massachusetts |
| 60 | Thomas Johnson | 21 | Nephew | Salesman | Massachusetts |
| 61 | Herbert J. Taylor | 26 | Head | Maintenance Man | Massachusetts |
| 62 | Ada M. Taylor | 21 | Wife | — | Massachusetts |
| 63 | Helen Taylor | 7 | Daughter | — | Massachusetts |
| 64 | Herbert Taylor | 5 | Son | — | Massachusetts |
| 65 | Lawrence Taylor | 3 | Son | — | Massachusetts |
| 66 | Geraldine Taylor | 2 | Daughter | — | Massachusetts |
| 67 | George Bennis | 62 | Head | Subway Pumpman | Massachusetts |
| 68 | Agnes Bennis | 61 | Wife | — | Massachusetts |
| 69 | Thomas Roddie | 36 | Head | Meat Lugger | Eire |
| 70 | Mary Roddie | 30 | Wife | — | Eire |
| 71 | Mary Roddie | 6 | Daughter | — | Massachusetts |
| 72 | Thomas Roddie | 3 | Son | — | Massachusetts |
| 73 | Ann Roddie | 1 | Daughter | — | Massachusetts |
| 74 | Arthur Grace | 40 | Head | House Painter | Canada-Eng |
| 75 | Catherine Grace | 40 | Wife | — | Canada-Eng |
| 76 | John Grace THIS PERSON | 13 | Son | — | Massachusetts |
| 77 | Arthur Grace | 11 | Son | — | Massachusetts |
| 78 | Delbert Grace | 6 | Son | — | Massachusetts |
| 79 | Robert Grace | 5 | Son | — | Massachusetts |
| 80 | Peter J. Compton | 50 | Lodger | Carpenter | Canada-Eng |
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)