MK
Mary Knox — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this Mary Knox across the 1930 and 1940 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 6-person household.
Age 8
b. ~1922
Female
Daughter
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Allegheny, Pennsylvania |
| Surname | Knox |
| Given Name | Mary Alice |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Mifflin Township |
| Est. Birth Year | ~1922 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Knox | Daughter | — | 8 | ~1922 |
| Virginia Knox | Daughter | — | 5 | ~1925 |
| Walter Knox | Son | — | 3 | ~1927 |
| Mary Knox | Spouse | — | 26 | ~1904 |
| Alvin Knox | Head | — | 40 | ~1890 |
| Alvin Knox | Son | — | 1 | ~1929 |
Census Appearances
1930
Allegheny, Pennsylvania
Daughter, age 8
Allegheny, Pennsylvania · implied b. ~1922 — 6 household members
| Surname | Knox |
| Given Name | Mary Alice |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 18
Allegheny-County, Pennsylvania · implied b. ~1922 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Knox |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 Knox across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Knox
Daughter · 1930 · age 8 · b. ~1922 · Pennsylvania
★ You are viewing this record
Sibling
Alvin Knox
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Knox
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Knox
Sibling · 1930 · age 3
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 — Allegheny, Pennsylvania
Open full size
1930 US Federal Census — Allegheny, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel1965:0882)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Ralph Smith | 15 | Son | — | Pennsylvania |
| 52 | Ruth Smith | 9 | Daughter | — | Pennsylvania |
| 53 | John P. Mayer | 54 | Head | — | Pennsylvania |
| 54 | Christina Mayer | 47 | Wife | — | Pennsylvania |
| 55 | John P. Mayer | 30 | Son | Laborer | Pennsylvania |
| 56 | Iona Mayer | 24 | Daughter | Clerk | Pennsylvania |
| 57 | James Gordon | 37 | Head | Conductor | Pennsylvania |
| 58 | Estella Gordon | 36 | Wife | — | Pennsylvania |
| 59 | Frances Gordon | 12 | Daughter | — | Pennsylvania |
| 60 | Bernard Gordon | 10 | Son | — | Pennsylvania |
| 61 | Virginia Gordon | 8 | Daughter | — | Pennsylvania |
| 62 | Catherine Gordon | 5 | Daughter | — | Pennsylvania |
| 63 | Eileen Gordon | 5 | Daughter | — | Pennsylvania |
| 64 | Paul Gordon | 4 | Son | — | Pennsylvania |
| 65 | Regina Gordon | 1 | Daughter | — | Pennsylvania |
| 66 | Roy Whindere | 30 | Head | Laborer | Pennsylvania |
| 67 | Edith Whindere | 26 | Wife | — | England |
| 68 | Frank W. Hugh | 18 | Boarder | — | Pennsylvania |
| 69 | Mary Jeffrey | 20 | Boarder | — | Pennsylvania |
| 70 | Myles Mooney | 34 | Head | Policeman | New Jersey |
| 71 | Mary Mooney | 32 | Wife | — | Ohio |
| 72 | Charles Mooney | 3 | Son | — | Pennsylvania |
| 73 | Sarah Mooney | 1 | Daughter | — | Pennsylvania |
| 74 | Frank Constantino | 40 | Head | Gardener | Italy |
| 75 | John Popovich | 42 | Head | Laborer | Hungary |
| 76 | Elizabeth Popovich | 35 | Wife | — | Pennsylvania |
| 77 | Andrew Popovich | 15 | Son | — | Pennsylvania |
| 78 | Beatrice Popovich | 13 | Daughter | — | Pennsylvania |
| 79 | James Popovich | 11 | Son | — | Pennsylvania |
| 80 | Gertrude Popovich | 9 | Daughter | — | Pennsylvania |
| 81 | Elmar Popovich | 5 | Son | — | Pennsylvania |
| 82 | Esther Popovich | 3 | Daughter | — | Pennsylvania |
| 83 | Dorothy Popovich | 1 | Daughter | — | Pennsylvania |
| 84 | George Bucholtz | 30 | Head | Mill Wright | Pennsylvania |
| 85 | Frances Bucholtz | 22 | Wife | — | Pennsylvania |
| 86 | Leroy Jr. Bucholtz | 5 | Son | — | Pennsylvania |
| 87 | Patricia Bucholtz | 4 | Daughter | — | Pennsylvania |
| 88 | Barbara Bucholtz | 2 | Daughter | — | Pennsylvania |
| 89 | William Airhart | 30 | Head | Clerk | Pennsylvania |
| 90 | Johanna Airhart | 33 | Wife | — | Pennsylvania |
| 91 | Eileen Airhart | 13 | Daughter | — | Pennsylvania |
| 92 | Jean Airhart | 8 | Daughter | — | Pennsylvania |
| 93 | Catherine Airhart | 6 | Daughter | — | Pennsylvania |
| 94 | Alvin Knox | 40 | Head | Mill Laborer | Kentucky |
| 95 | Mary Knox | 26 | Wife | — | Pennsylvania |
| 96 | Mary Alice Knox THIS PERSON | 8 | Daughter | — | Pennsylvania |
| 97 | Virginia Knox | 5 | Daughter | — | Pennsylvania |
| 98 | Walter Knox | 3 | Son | — | Pennsylvania |
| 99 | Alvin Knox | 1 | Son | — | Pennsylvania |
| 100 | <End> | None | — | — | — |
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)