JG
John Grace — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Yolo-County, California
Our Model Tree links this John Grace across the 1930 and 1940 US Censuses in Yolo-County, California (XGBoost, ~Confirmed) — first a son (b.~1914), then head of a 8-person household.
Age 26
b. ~1914
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Yolo-County, California |
| Surname | Grace |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Broderick |
| 1935 Residence (County) | Yolo |
| Additional Details | |
| Occupation | Railroad |
| Industry | Railroad Shop |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Railroad |
| Township / Ward | Broderick |
| Est. Birth Year | ~1914 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Jimmie Grace | Son | — | 8 | ~1932 |
| John Grace | Son | — | 26 | ~1914 |
| Elfira Grace | Spouse | — | 49 | ~1891 |
| Beatrice Grace | Daughter | — | 22 | ~1918 |
| May Grace | Daughter | — | 12 | ~1928 |
| Benjamin Grace | Head | — | 49 | ~1891 |
| Nellie Grace | Daughter | — | 20 | ~1920 |
| Mary Grace | Daughter | — | 6 | ~1934 |
Census Appearances
1930
Yolo, California
Son, age 17
Yolo, California · implied b. ~1913 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grace |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Portuguese |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Yolo-County, California
Son, age 26
Yolo-County, California · implied b. ~1914 — 8 household members
| Surname | Grace |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Broderick |
| 1935 Residence (County) | Yolo |
| Occupation | Railroad |
| Industry | Railroad Shop |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | No 8 |
| 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 26 · b. ~1914 · California
★ You are viewing this record
Sibling
Mary Grace
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Beatrice Grace
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nellie Grace
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jimmie Grace
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
May Grace
Sibling · 1940 · age 12
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 — Yolo-County, California
Open full size
1940 US Federal Census — Yolo-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00366-00422)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Adam G. Keck | 67 | Head | — | Norway |
| 42 | Frank P. Huber | 73 | Head | — | Missouri |
| 43 | H. E. Mcmahon | 66 | Head | — | Wisconsin |
| 44 | Bernard C. Huffman | 80 | Head | — | New York |
| 45 | Walter M. Gibsons | 34 | Head | Mechanic | New York |
| 46 | Mortimer W. Mason | 58 | Head | — | Mississippi |
| 47 | Vincent De Riso | 71 | Head | — | Italy |
| 48 | Ida S. De Riso | 70 | Wife | — | Vermont |
| 49 | John A. Miller | 47 | Head | Plumber | California |
| 50 | Glenn J. Miller | 9 | Son | — | California |
| 51 | Frank Quinn | 33 | Head | Cook | Texas |
| 52 | George W. Powell | 29 | Brother-in-law | Janitor | Texas |
| 53 | Julian Powell | 28 | Wife | — | Texas |
| 54 | Archie C. Lewis | 48 | Head | Clerk | California |
| 55 | Hazel Lewis | 45 | Wife | — | California |
| 56 | Donald Lewis | 22 | Son | Guide | California |
| 57 | Catherine Lewis | 19 | Daughter | — | California |
| 58 | Harold Lewis | 17 | Son | — | California |
| 59 | Ernest Lewis | 16 | Son | — | California |
| 60 | Adelle Lewis | 13 | Daughter | — | California |
| 61 | Ralph Lewis | 10 | Son | — | California |
| 62 | Walter Lewis | 7 | Son | — | California |
| 63 | Walter J. Leinberger | 49 | Head | Butcher | California |
| 64 | Zetta D. Leinberger | 38 | Wife | — | California |
| 65 | William J. Leinberger | 8 | Son | — | California |
| 66 | Minnie Murphy | 72 | Mother-in-law | — | California |
| 67 | George Stoddard | 41 | Brother-in-law | Ranch Hand | California |
| 68 | Benjamin Grace | 49 | Head | Ranch Hand | Cape Verde Is. |
| 69 | Elfira Grace | 49 | Wife | — | Cape Verde Is. |
| 70 | John Grace THIS PERSON | 26 | Son | Railroad | Massachusetts |
| 71 | Beatrice Grace | 22 | Daughter | — | California |
| 72 | Nellie Grace | 20 | Daughter | New Worker | California |
| 73 | May Grace | 12 | Daughter | — | California |
| 74 | Jimmie Grace | 8 | Son | — | California |
| 75 | Mary Grace | 6 | Daughter | — | California |
| 76 | Neville Horrell | 32 | Head | Stenographer | California |
| 77 | Claude Howard | 40 | Head | Laborer | California |
| 78 | Harriett Howard | 41 | Wife | — | California |
| 79 | Violet F. Breeding | 20 | Daughter | — | California |
| 80 | Howard Breeding | 21 | Son-in-law | Counterman | California |
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)