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John Grace — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Harford-County, Maryland
Our Model Tree links this John Grace across the 1930 and 1940 US Censuses in Harford-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 8-person household.
Age 17
b. ~1923
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Harford-County, Maryland |
| Surname | Grace |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 2 |
| Additional Details | |
| Occupation | Shoe Factory |
| Industry | PW |
| Class of Worker | 30 |
| Highest Grade | Hs 4 |
| 1935 Residence | 5 |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Shoe Factory |
| Township / Ward | Election District 2 |
| Est. Birth Year | ~1923 |
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 |
|---|---|---|---|---|
| Alice Grace | Spouse | — | 43 | ~1897 |
| Calvin Grace | Son | — | 5 | ~1935 |
| Preston Grace | Head | — | 45 | ~1895 |
| Virginia Grace | Daughter | — | 8 | ~1932 |
| Clifton Grace | Son | — | 11 | ~1929 |
| Allen Grace | Son | — | 14 | ~1926 |
| John Grace | Son | — | 17 | ~1923 |
| Wilson Grace | Son | — | 21 | ~1919 |
Census Appearances
1930
Harford, Maryland
Son, age 7
Harford, Maryland · implied b. ~1923 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grace |
| Given Name | John L |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Harford-County, Maryland
Son, age 17
Harford-County, Maryland · implied b. ~1923 — 8 household members
| Surname | Grace |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 2 |
| Occupation | Shoe Factory |
| Industry | PW |
| Class of Worker | 30 |
| Highest Grade | Hs 4 |
| 1935 Residence | 5 |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 17 · b. ~1923 · Maryland
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Sibling
Virginia Grace
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clifton Grace
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Allen Grace
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wilson Grace
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Calvin Grace
Sibling · 1940 · age 5
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 — Harford-County, Maryland
Open full size
1940 US Federal Census — Harford-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01551-00264)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Earl Cullum | 23 | Son | Paperhanger | Maryland |
| 42 | Mary E. Cullum | 23 | Daughter | — | Maryland |
| 43 | Clara Ann Cullum | 13 | Daughter | — | Maryland |
| 44 | Mitchell Cullum | 12 | Son | — | Maryland |
| 45 | Marguerite Cullum | 10 | Daughter | — | Maryland |
| 46 | Nelson Cullum | 8 | Son | — | Maryland |
| 47 | Estelle Lillion | 67 | Head | — | Maryland |
| 48 | George F. Lushang | 72 | Head | Own Farm | Maryland |
| 49 | Matilda Lushang | 72 | Wife | — | Maryland |
| 50 | John Lushang | 48 | Son | Father'S Farm | Maryland |
| 51 | Ethel Lushang | 40 | Daughter | — | Maryland |
| 52 | Mae Lushang | 36 | Daughter | Elementary School | Maryland |
| 53 | Hoyt R. Mosley | 34 | Head | Own Farm | N. Carolina |
| 54 | Siporanna Mosley | 27 | Wife | — | Virginia |
| 55 | Hoyt Mosley | 8 | Son | — | Maryland |
| 56 | Delaney Mosley | 6 | Son | — | Maryland |
| 57 | Robert Mosley | 4 | Son | — | Maryland |
| 58 | Nancy Mosley | 3 | Daughter | — | Maryland |
| 59 | James Dean | 61 | Head | Farm Hand | Virginia |
| 60 | Hubert Dean | 24 | Son | Laborer | Virginia |
| 61 | Robert Dean | 18 | Son | Laborer | Virginia |
| 62 | Page Dean | 15 | Son | — | Virginia |
| 63 | Viola Dean | 34 | Daughter | — | Maryland |
| 64 | William Mcbaker | 64 | Head | — | Maryland |
| 65 | Sarah Mcbaker | 69 | Wife | — | Maryland |
| 66 | Thomas Mcbaker | 21 | Son | Shoe Factory | Maryland |
| 67 | William Mcbaker | 8 | Son | — | Maryland |
| 68 | Thomas L. Mcbaker | 4 | Grandson | — | Maryland |
| 69 | Betty Mcbaker | 1 | Granddaughter | — | Maryland |
| 70 | Viola Mcbaker | 24 | Daughter-in-law | — | Virginia |
| 71 | Lloyd Parker | 70 | Head | — | Maryland |
| 72 | Lillian Parker | 30 | Daughter | Restaurant | Maryland |
| 73 | Preston Grace | 45 | Head | State Roads | N. Carolina |
| 74 | Alice E. Grace | 43 | Wife | — | Maryland |
| 75 | Wilson Grace | 21 | Son | Father | Maryland |
| 76 | John Grace THIS PERSON | 17 | Son | Shoe Factory | Maryland |
| 77 | Allen Grace | 14 | Son | — | Maryland |
| 78 | Clifton Grace | 11 | Son | — | Maryland |
| 79 | Virginia Grace | 8 | Daughter | — | Maryland |
| 80 | Calvin Grace | 5 | Son | — | Maryland |
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)