MC
Mary Connelly — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Connelly across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 8-person household.
Age 13
b. ~1927
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Connelly |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Turtle Creek Borough |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Industry | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Turtle Creek Borough |
| Est. Birth Year | ~1927 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Connelly | Spouse | — | 44 | ~1896 |
| Harry Connelly | Son | — | 8 | ~1932 |
| John Connelly | Son | — | 17 | ~1923 |
| Bernard Connelly | Son | — | 15 | ~1925 |
| Richard Connelly | Son | — | 3 | ~1937 |
| Mary Connelly | Daughter | — | 13 | ~1927 |
| Anne Connelly | Daughter | — | 11 | ~1929 |
| John Connelly | Head | — | 46 | ~1894 |
Census Appearances
1930
Allegheny, Pennsylvania
Daughter, age 1
Allegheny, Pennsylvania · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Conely |
| Given Name | Mary A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| 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 13
Allegheny-County, Pennsylvania · implied b. ~1927 — 8 household members
| Surname | Connelly |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Turtle Creek Borough |
| 1935 Residence (County) | Allegheny |
| Industry | 0 |
| Highest Grade | 7 |
| 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 Connelly across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Connelly
Daughter · 1940 · age 13 · b. ~1927 · Pennsylvania
★ You are viewing this record
Sibling
John Connelly
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harry Connelly
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anne Connelly
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Connelly
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Connelly
Sibling · 1940 · age 15
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-t0627-03419-00555)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marietta Humpher | 15 | Daughter | — | Pennsylvania |
| 42 | Joseph Humpher | 11 | Son | — | Pennsylvania |
| 43 | William Humpher | 2 | Son | — | Pennsylvania |
| 44 | Cristina Angelone | 45 | Head | Scrub Woman | Italy |
| 45 | Alfred Angelone | 18 | Son | — | Pennsylvania |
| 46 | Agnes Angelone | 15 | Daughter | — | Pennsylvania |
| 47 | Margaret Angelone | 11 | Daughter | — | Pennsylvania |
| 48 | William S. Stauffer | 48 | Head | Laborer | Pennsylvania |
| 49 | Mary Ann Stauffer | 48 | Wife | — | Pennsylvania |
| 50 | William S. Jr. Stauffer | 6 | Son | — | Pennsylvania |
| 51 | Charles Ford | 49 | Head | Clerk | Pennsylvania |
| 52 | Lydia Ford | 47 | Wife | — | Pennsylvania |
| 53 | Fred Ford | 28 | Son | Director Of Testing | Pennsylvania |
| 54 | Pauline Cole | 71 | Head | — | Pennsylvania |
| 55 | Paul R. Beck | 42 | Son-in-law | Fireman | Pennsylvania |
| 56 | Henrietta Beck | 41 | Daughter | — | Pennsylvania |
| 57 | Thomas Beck | 22 | Grandson | Clerk | Pennsylvania |
| 58 | Leon Beck | 20 | Grandson | New Worker | Pennsylvania |
| 59 | Florence Beck | 14 | Granddaughter | — | Pennsylvania |
| 60 | Michael Mcvay | 27 | Head | Clerk | Pennsylvania |
| 61 | Anna Mcvay | 27 | Wife | — | Pennsylvania |
| 62 | Nancy J. Mcvay | 39 | Head | Laborer | Pennsylvania |
| 63 | Esther Mcvay | 21 | Wife | Waitress | Pennsylvania |
| 64 | Ronald Mcvay | 1 | Son | — | Pennsylvania |
| 65 | Ida Hudak | 58 | Head | Skilled Laborer | Pennsylvania |
| 66 | Elva L. Hudak | 30 | Daughter | — | Pennsylvania |
| 67 | Harry Duncan | 22 | Son-in-law | Laborer | Pennsylvania |
| 68 | Nellie Greenaway | 52 | Head | Repairman | Pennsylvania |
| 69 | Irene Greenaway | 23 | Wife | — | Pennsylvania |
| 70 | Nellie Jr. Greenaway | 15 | Son | — | Pennsylvania |
| 71 | John Connelly | 46 | Head | Policeman | Pennsylvania |
| 72 | Mary Connelly | 44 | Wife | — | Maryland |
| 73 | John, Jr. Connelly | 17 | Son | — | Pennsylvania |
| 74 | Bernard Connelly | 15 | Son | — | Pennsylvania |
| 75 | Mary Connelly THIS PERSON | 13 | Daughter | — | Pennsylvania |
| 76 | Anne Connelly | 11 | Daughter | — | Pennsylvania |
| 77 | Harry Connelly | 8 | Son | — | Pennsylvania |
| 78 | Richard Connelly | 3 | Son | — | Pennsylvania |
| 79 | Percy Naylor | 39 | Head | 572 Laborer | Pennsylvania |
| 80 | Alice Naylor | 32 | Wife | — | 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)