MG
Mary Grace — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Delaware, Pennsylvania
Our Model Tree links this Mary Grace across the 1930 and 1940 US Censuses in Delaware, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1915), then head of a 9-person household.
Age 15
b. ~1915
Female
Daughter
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Delaware, Pennsylvania |
| Surname | Grace |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Linwood Heights |
| Est. Birth Year | ~1915 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Grace | Daughter | — | 15 | ~1915 |
| Walter Grace | Son | — | 4 | ~1926 |
| Sarah Grace | Spouse | — | 43 | ~1887 |
| Jean Grace | Daughter | — | 1 | ~1929 |
| John Grace | Son | — | 18 | ~1912 |
| Helen Grace | Daughter | — | 11 | ~1919 |
| Elizabeth Grace | Daughter | — | 17 | ~1913 |
| Charles Grace | Son | — | 6 | ~1924 |
| John Grace | Head | — | 48 | ~1882 |
Census Appearances
1930
Delaware, Pennsylvania
Daughter, age 15
Delaware, Pennsylvania · implied b. ~1915 — 9 household members
| Surname | Grace |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Delaware-County, Pennsylvania
Spouse, age 25
Delaware-County, Pennsylvania · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Greco |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Darby Brough |
| 1935 Residence (County) | Delaware |
| Hours Worked | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Mary Grace across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Grace
Daughter · 1930 · age 15 · b. ~1915 · Pennsylvania
★ You are viewing this record
Sibling
Walter Grace
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Grace
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Grace
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Grace
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Grace
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Grace
Sibling · 1930 · age 1
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
1930 US Federal Census — Delaware, Pennsylvania
Open full size
1930 US Federal Census — Delaware, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel2031:0370)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Charles S. Matthews | 31 | Head | — | Pennsylvania |
| 52 | George L. Duryea | 31 | Head | Electrician | Wales |
| 53 | Frances Duryea | 31 | Wife | — | Pennsylvania |
| 54 | William Duryea | 9 | Son | — | Pennsylvania |
| 55 | Elizabeth Duryea | 6 | Daughter | — | Pennsylvania |
| 56 | Nina H. Brooks | 35 | Head | Proprietor | Virginia |
| 57 | Elva Brooks | 11 | Daughter | — | Virginia |
| 58 | Alice Brooks | 9 | Daughter | — | Virginia |
| 59 | Gladys Brooks | 6 | Daughter | — | Virginia |
| 60 | Norman Gray | 27 | Boarder | Body Assembler | Virginia |
| 61 | Guy Clark | 30 | Boarder | Boiler Maker | North Dakota |
| 62 | Oliver Brooks | 37 | Boarder | Boiler Maker | Kansas |
| 63 | Emory Newton | 23 | Boarder | Pipe Fitter | Maryland |
| 64 | Grover Cooper | 33 | Boarder | Auto Mechanic | Maryland |
| 65 | John Loper | 41 | Boarder | Boiler Maker | Oklahoma |
| 66 | George Cochran | 51 | Boarder | Boiler Maker | Scotland |
| 67 | Walter S. Fisher | 53 | Head | Foreman | England |
| 68 | Elizabeth Fisher | 41 | Wife | — | England |
| 69 | Walter Jr. Fisher | 11 | Son | — | Pennsylvania |
| 70 | Verne S. Water | 36 | Head | Real Estate | Pennsylvania |
| 71 | Gladys M. Water | 33 | Wife | — | New Jersey |
| 72 | Verne Jr. Water | 11 | Son | — | West Virginia |
| 73 | George E. Water | 6 | Son | — | Pennsylvania |
| 74 | Israel G. De Knight | 23 | Boarder | Carpenter | Pennsylvania |
| 75 | Amy G. Howie | 44 | Head | Waitress | England |
| 76 | George Howie | 16 | Son | Machine Hand | England |
| 77 | John S. Grace | 48 | Head | Assistant Foreman | Pennsylvania |
| 78 | Sarah G. Grace | 43 | Wife | — | Pennsylvania |
| 79 | John S. Jr. Grace | 18 | Son | — | Pennsylvania |
| 80 | Elizabeth G. Grace | 17 | Daughter | — | Pennsylvania |
| 81 | Mary E. Grace THIS PERSON | 15 | Daughter | — | Pennsylvania |
| 82 | Helen J. Grace | 11 | Daughter | — | Pennsylvania |
| 83 | Charles S. Grace | 6 | Son | — | Pennsylvania |
| 84 | Walter F. Grace | 4 | Son | — | Pennsylvania |
| 85 | Jean Grace | 1 | Daughter | — | Pennsylvania |
| 86 | Harry L. Fulton | 23 | Head | Operator | Pennsylvania |
| 87 | Margaret E. Fulton | 19 | Wife | — | Maryland |
| 88 | Harry L. Jr. Fulton | 2 | Son | — | Pennsylvania |
| 89 | William J. Fulton | 1 | Son | — | Pennsylvania |
| 90 | Florence Snyder | 28 | Sister | — | New Jersey |
| 91 | Bernice Snyder | 6 | Niece | — | Pennsylvania |
| 92 | Leslie E. Jr. Snyder | 4 | Nephew | — | Pennsylvania |
| 93 | Harry Snyder | 2 | Nephew | — | Pennsylvania |
| 94 | Leslie E. Snyder | 25 | Brother-in-law | Operator | Maryland |
| 95 | Elmer H. Queen | 35 | Head | Operator | Pennsylvania |
| 96 | Julia E. Queen | 32 | Wife | — | Pennsylvania |
| 97 | Elmer H. Jr. Queen | 10 | Son | — | Pennsylvania |
| 98 | George W. Queen | 6 | Son | — | Pennsylvania |
| 99 | Roland E. Freeling | 33 | Head | Mechanic | England |
| 100 | Camilla Freeling | 36 | Wife | — | England |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)