JC
James Connolly — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this James Connolly across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 9-person household.
Age 15
b. ~1925
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Connolly |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1925 |
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 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Stephen Connolly | Son | — | 23 | ~1917 |
| Catherine Connolly | Daughter | — | 17 | ~1923 |
| Marie Connolly | Daughter | — | 21 | ~1919 |
| Coleman Connolly | Son | — | 8 | ~1932 |
| Edward Connolly | Son | — | 9 | ~1931 |
| James Connolly | Son | — | 15 | ~1925 |
| Mary Connolly | Spouse | — | 48 | ~1892 |
| John Connolly | Son | — | 19 | ~1921 |
| Joseph Connolly | Head | — | 44 | ~1896 |
Census Appearances
1930
Allegheny, Pennsylvania
Son, age 5
Allegheny, Pennsylvania · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connelly |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 15
Allegheny-County, Pennsylvania · implied b. ~1925 — 9 household members
| Surname | Connolly |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Highest Grade | H-1 |
| 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 James Connolly across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Connolly
Son · 1940 · age 15 · b. ~1925 · Pennsylvania
★ You are viewing this record
Sibling
John Connolly
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Coleman Connolly
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Connolly
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Connolly
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Connolly
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stephen Connolly
Sibling · 1940 · age 23
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03653-00126)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Regis C. Kelley | 7 | Son | — | Pennsylvania |
| 42 | Leona J. Kelley | 7 | Son | — | Pennsylvania |
| 43 | John J. Jarosik | 27 | Head | Baker Helper | Pennsylvania |
| 44 | Nellie Jarosik | 27 | Wife | Stenographer | Pennsylvania |
| 45 | Jerry J. Sullivan | 54 | Head | Roofer | Pennsylvania |
| 46 | Edward J. Sullivan | 52 | Brother | Tinner | Pennsylvania |
| 47 | Alice Sullivan | 41 | Sister | Bookkeeper | Pennsylvania |
| 48 | Joseph J. Connolly | 44 | Head | Street Car Operator | Free State |
| 49 | Mary E. Connolly | 48 | Wife | — | Free State |
| 50 | Stephen J. Connolly | 23 | Son | Repairman | Pennsylvania |
| 51 | Marie Connolly | 21 | Daughter | Stenographer | Pennsylvania |
| 52 | John Connolly | 19 | Son | New Worker | Pennsylvania |
| 53 | Catherine Connolly | 17 | Daughter | — | Pennsylvania |
| 54 | James Connolly THIS PERSON | 15 | Son | — | Pennsylvania |
| 55 | Edward Connolly | 9 | Son | — | Pennsylvania |
| 56 | Coleman Connolly | 8 | Son | — | Pennsylvania |
| 57 | Joseph A. Schiegg | 33 | Head | Labor | Pennsylvania |
| 58 | Agnes Schiegg | 29 | Wife | — | Pennsylvania |
| 59 | William J. Bair | 37 | Head | Salesman | Wheeling, W. Va. |
| 60 | Helen R. Bair | 31 | Wife | — | Pennsylvania |
| 61 | Dolores Bair | 10 | Daughter | — | Pennsylvania |
| 62 | Alice Bair | 5 | Daughter | — | Pennsylvania |
| 63 | Walter Merryman | 58 | Head | — | Ireland |
| 64 | Alice Merryman | 59 | Wife | — | Ireland |
| 65 | Samuel J. Havel | 73 | Head | — | Kentucky |
| 66 | Clara Havel | 72 | Wife | — | Pennsylvania |
| 67 | Kittie R. Mckenzie | 89 | Head | — | Canada English |
| 68 | Mary Chisler | 28 | Lodger | Registered Nurse | Pennsylvania |
| 69 | Michael E. Duffy | 47 | Head | Street Car Operator | Pennsylvania |
| 70 | Margaret E. Duffy | 47 | Wife | — | Ireland |
| 71 | Marjorie R. Duffy | 20 | Daughter | Stenographer | Pennsylvania |
| 72 | Thomas C. Duffy | 17 | Son | — | Pennsylvania |
| 73 | Edward W. Duffy | 11 | Son | — | Pennsylvania |
| 74 | John Connolly | 36 | Head | Policeman | Free State |
| 75 | Cecelia Connolly | 29 | Wife | — | Ireland |
| 76 | Mary Connolly | 5 | Daughter | — | Pennsylvania |
| 77 | Joseph J. Connolly | 1 | Son | — | Pennsylvania |
| 78 | Theodore A. Malburg | 36 | Head | Plumber | Pennsylvania |
| 79 | Matilda R. Malburg | 35 | Wife | — | Pennsylvania |
| 80 | Theodore Jr. Malburg | 15 | Son | — | Pennsylvania |
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)