MK
Mary Kerr — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this Mary Kerr across the 1920 and 1930 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1918), then head of a 6-person household.
Age 12
b. ~1918
Female
Daughter
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Allegheny, Pennsylvania |
| Surname | Kerr |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | New York |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1918 |
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 |
|---|---|---|---|---|
| Ruth Kerr | Other | — | 71 | ~1859 |
| Loyal Kerr | Head | — | 41 | ~1889 |
| John Kerr | Son | — | 18 | ~1912 |
| Mary Kerr | Daughter | — | 12 | ~1918 |
| Robert Kerr | Son | — | 12 | ~1918 |
| Helen Kerr | Daughter | — | 10 | ~1920 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 2
Allegheny, Pennsylvania · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kerr |
| Given Name | Mary J |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | New York |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 12
Allegheny, Pennsylvania · implied b. ~1918 — 6 household members
| Surname | Kerr |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | New York |
| Can Read/Write | 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 Mary Kerr across 2 US Census years (1920 and 1930) in Allegheny, Pennsylvania, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kerr
Daughter · 1930 · age 12 · b. ~1918 · Pennsylvania
★ You are viewing this record
Sibling
Helen Kerr
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Kerr
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Kerr
Sibling · 1930 · age 18
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:fifteenthcensus00reel1973:0264)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Alfred S. Anderson | 46 | Head | Pro-Director | Pennsylvania |
| 52 | Mabel Anderson | 42 | Wife | — | Missouri |
| 53 | Marie Newbill | 71 | Mother | — | Missouri |
| 54 | Clair F. Walker | 32 | Head | Salesman | Pennsylvania |
| 55 | Frances E. Walker | 24 | Wife | — | Pennsylvania |
| 56 | Helen Gallagher | 27 | Head | Social Worker | New York |
| 57 | Kathryn Gallagher | 25 | Lodger | Teacher | New York |
| 58 | Edward Cooper | 29 | Head | Mgr-Passenger | Iowa |
| 59 | Bernice Cooper | 36 | Wife | — | United States |
| 60 | Gloria J. Cooper | 8 | Daughter | — | Illinois |
| 61 | James W. Mccord | 22 | Head | Salesman | Canada-English |
| 62 | Narcissa C. Mccord | 22 | Wife | — | Pennsylvania |
| 63 | Narcissa C. Mccord | 1 | Daughter | — | Pennsylvania |
| 64 | Guy M. Davis | 32 | Head | Salesman | West Virginia |
| 65 | Margaret M. Davis | 29 | Wife | — | West Virginia |
| 66 | Harry T. Mawhinney | 40 | Lodger | President | Pennsylvania |
| 67 | Irene I. Dennis | 34 | Head | Reg Nurse | Pennsylvania |
| 68 | Mary A. Dennis | 42 | Lodger | Reg Nurse | Illinois |
| 69 | Maurice H. Weil | 24 | Head | Teacher | New York |
| 70 | Frances A. Weil | 24 | Wife | — | Vermont |
| 71 | Loyal E. Kerr | 41 | Head | Executive | New York |
| 72 | John E. Kerr | 18 | Son | — | Pennsylvania |
| 73 | Robert E. Kerr | 12 | Son | — | West Virginia |
| 74 | Helen M. Kerr | 10 | Daughter | — | West Virginia |
| 75 | Mary J. Kerr THIS PERSON | 12 | Daughter | — | Pennsylvania |
| 76 | Ruth B. Kerr | 71 | Mother | — | Pennsylvania |
| 77 | Samuel B. Charter | 21 | Head | Manager | Pennsylvania |
| 78 | Lillian M. Charter | 19 | Wife | Asst Manager | Pennsylvania |
| 79 | Samuel B. Jr. Charter | 0 | Son | — | Pennsylvania |
| 80 | Clara S. Ritter | 61 | Head | Manager | Pennsylvania |
| 81 | Katherine C. Ralston | 64 | Sister | Asst Manager | Pennsylvania |
| 82 | Benjamin A. Sotte | 64 | Head | Attorney | Pennsylvania |
| 83 | Gertrude Sotte | 58 | Wife | — | Pennsylvania |
| 84 | Lee Mcconnell | 31 | Head | Salesman | Virginia |
| 85 | Elsie J. Mcconnell | 30 | Wife | — | Virginia |
| 86 | Clair E. Speer | 22 | Head | Engineer | Ohio |
| 87 | John E. Ceral | 22 | Lodger | Teacher | Pennsylvania |
| 88 | Allen A. Allen | 22 | Lodger | Salesman | West Virginia |
| 89 | Mellie S. Butter | 30 | Head | Teacher | Alabama |
| 90 | Helen G. Butter | 25 | Wife | — | Pennsylvania |
| 91 | Helen G. Butter | 2 | Daughter | — | Pennsylvania |
| 92 | Mary C. Muegler | 58 | Head | — | Pennsylvania |
| 93 | Dorothy E. Muegler | 28 | Daughter | Stenographer | Pennsylvania |
| 94 | John W. Dreyer | 33 | Head | Engineer | Missouri |
| 95 | Lois S. Dreyer | 31 | Wife | — | Illinois |
| 96 | William G. Shellcross | 62 | Head | Physician | Maryland |
| 97 | William G. Shellcross | 20 | Son | — | Pennsylvania |
| 98 | Marion Carello | 24 | Lodger | Housekeeper | Italy |
| 99 | Richard R. Archer | 26 | Head | Salesman | Indiana |
| 100 | Cora E. Early | 60 | Head | Dean | Pennsylvania |
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)