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John Grace — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this John Grace across the 1910 and 1920 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1901), then head of a 6-person household.
Age 19
b. ~1901
Male
Son
Born: Pennsylvania
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Allegheny, Pennsylvania |
| Surname | Grace |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Occupation | Salesman |
| Industry | Clothing |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Salesman |
| Township / Ward | City Of Pittsburgh |
| Est. Birth Year | ~1901 |
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.
6 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Grace | Son | — | 19 | ~1901 |
| Albert Grace | Son | — | 12 | ~1908 |
| Ruth Grace | Daughter | — | 6 | ~1914 |
| Lydia Grace | Head | — | 41 | ~1879 |
| Eva Grace | Daughter | — | 15 | ~1905 |
| Paul Grace | Son | — | 10 | ~1910 |
Census Appearances
1910
Allegheny, Pennsylvania
Son, age 9
Allegheny, Pennsylvania · implied b. ~1901 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grace |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Allegheny, Pennsylvania
Son, age 19
Allegheny, Pennsylvania · implied b. ~1901 — 6 household members
| Surname | Grace |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Salesman |
| Industry | Clothing |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| 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 John Grace across 2 US Census years (1910 and 1920) in Allegheny, Pennsylvania, using XGBoost record linkage.
Show:
This person
Anchor record
John Grace
Son · 1920 · age 19 · b. ~1901 · Pennsylvania
★ You are viewing this record
Sibling
Eva Grace
Sibling · 1920 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Grace
Sibling · 1920 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Grace
Sibling · 1920 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Grace
Sibling · 1920 · age 10
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
1920 US Federal Census — Allegheny, Pennsylvania
Open full size
1920 US Federal Census — Allegheny, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1521unit:0363)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Paul T Hennessy | 10 | Head | None | Pennsylvania |
| 52 | Lydia A Grace | 41 | Head | Housewife | Pennsylvania |
| 53 | John W Grace THIS PERSON | 19 | Son | Salesman | Pennsylvania |
| 54 | Eva S Grace | 15 | Daughter | Bookkeeper | Pennsylvania |
| 55 | Albert J Grace | 12 | Son | None | Pennsylvania |
| 56 | Paul Wm Grace | 10 | Son | None | Pennsylvania |
| 57 | Ruth M Grace | 6 | Daughter | None | Pennsylvania |
| 58 | Walter Devlin | 41 | Head | Inspector | Pennsylvania |
| 59 | Mary Devlin | 36 | Wife | None | Pennsylvania |
| 60 | Gerald Devlin | 18 | Son | None | Pennsylvania |
| 61 | Isabelle Devlin | 16 | Daughter | None | Pennsylvania |
| 62 | Esther Devlin | 14 | Daughter | None | Pennsylvania |
| 63 | James Devlin | 10 | Son | None | Pennsylvania |
| 64 | Edward Volk | 41 | Head | Painter | New York |
| 65 | Jennie Volk | 41 | Wife | None | Canada |
| 66 | Marion Volk | 19 | Daughter | None | New York |
| 67 | John Volk | 3 | Son | None | Pennsylvania |
| 68 | Frank Long | 28 | Head | Plumber | United States |
| 69 | Emma Long | 26 | Wife | None | United States |
| 70 | Annie Constans | 27 | Head | None | Pennsylvania |
| 71 | Florence Constans | 23 | Daughter | Operator | Pennsylvania |
| 72 | Harry Glaser | 21 | Boarder | Boiler Maker | Pennsylvania |
| 73 | Myrtle Glaser | 20 | Boarder | None | Pennsylvania |
| 74 | John Casarichi | 41 | Head | Machinist | New York |
| 75 | Nellie Casarichi | 38 | Wife | None | New York |
| 76 | Edward Casarichi | 16 | Son | None | New York |
| 77 | Thelma Casarichi | 7 | Daughter | None | Pennsylvania |
| 78 | Robert Casarichi | 2 | Son | None | Pennsylvania |
| 79 | Helen Hilenbrandt | 65 | Mother in law | None | New York |
| 80 | Clara Hilenbrandt | 35 | Sister in law | Specialist | New York |
| 81 | Julia Hilenbrandt | 30 | Sister in law | Saleslady | New York |
| 82 | Annie Mack | 46 | Head | None | Pennsylvania |
| 83 | Helen Mack | 25 | Daughter | Clerk | Pennsylvania |
| 84 | Leo Mack | 21 | Son | Clerk | Pennsylvania |
| 85 | Sophia Garrard | 49 | Head | None | Pennsylvania |
| 86 | Ralph Garrard | 23 | Son | Chauffeur | Pennsylvania |
| 87 | Robert Stewart | 54 | Head | Clerk | Ohio |
| 88 | Henrietta Stewart | 39 | Wife | Dressmaking | Ohio |
| 89 | Winford Stewart | 10 | Son | None | Ohio |
| 90 | Clarence Leakey | 25 | Grandson in law | Dealer | Ohio |
| 91 | Justine Leakey | 23 | Granddaughter | None | Ohio |
| 92 | Harry Pax | 53 | Head | W | France |
| 93 | Laura Pax | 52 | Wife | None | Pennsylvania |
| 94 | Arthur Pax | 22 | Son | Inspector | Pennsylvania |
| 95 | Leroy Pax | 19 | Son | Clerk | West Va |
| 96 | Leblond Pax | 15 | Son | None | West Va |
| 97 | Alfonzoes Pax | 11 | Daughter | None | West Va |
| 98 | Beatrice Gallagher | 23 | Daughter | Clerk | Pennsylvania |
| 99 | Arthur Gallagher | 5 | Grandson | None | Pennsylvania |
| 100 | William Gallagher | 3 | Grandson | None | Pennsylvania |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)