MC
Mary Connolly — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this Mary Connolly across the 1930 and 1940 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 9-person household.
Age 3
b. ~1927
Female
Daughter
Born: Penna
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Philadelphia, Pennsylvania |
| Surname | Connolly |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Penna |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
| Township / Ward | Philadelphia City |
| 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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| William Connolly | Son | — | 5 | ~1925 |
| John Connolly | Son | — | 11 | ~1919 |
| Thomas Connolly | Other | — | 25 | ~1905 |
| Mary Connolly | Daughter | — | 3 | ~1927 |
| Theresa Connolly | Daughter | — | 1 | ~1929 |
| Joseph Connolly | Son | — | 6 | ~1924 |
| Mary Connolly | Spouse | — | 41 | ~1889 |
| James Connolly | Head | — | 43 | ~1887 |
| James Connolly | Son | — | 13 | ~1917 |
Census Appearances
1930
Philadelphia, Pennsylvania
Daughter, age 3
Philadelphia, Pennsylvania · implied b. ~1927 — 9 household members
| Surname | Connolly |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Penna |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1940
Philadelphia-County, Pennsylvania
Other, age 13
Philadelphia-County, Pennsylvania · implied b. ~1927 — 22 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connolly |
| Given Name | Margaret |
| Relationship to Head | Student |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Penna |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Class of Worker | 6 |
| Hours Worked | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
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 Connolly across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Connolly
Daughter · 1930 · age 3 · b. ~1927 · Pennsylvania
★ You are viewing this record
Sibling
James Connolly
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Connolly
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Connolly
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Connolly
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Connolly
Sibling · 1930 · age 1
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 — Philadelphia, Pennsylvania
Open full size
1930 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel2107:0087)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Connolly | 43 | Head | Water Tender | Irish Free State |
| 2 | Mary Connolly | 41 | Wife | — | Irish Free State |
| 3 | James Connolly | 13 | Son | — | Penna |
| 4 | John Connolly | 11 | Son | — | Penna |
| 5 | Joseph Connolly | 6 | Son | — | Penna |
| 6 | William Connolly | 5 | Son | — | Penna |
| 7 | Mary Connolly THIS PERSON | 3 | Daughter | — | Penna |
| 8 | Theresa Connolly | 1 | Daughter | — | Penna |
| 9 | Thomas Connolly | 25 | Brother | Fireman | Irish Free State |
| 10 | Harry Gillespie | 51 | Head | Dyer | Penna |
| 11 | Mary Gillespie | 48 | Wife | — | Penna |
| 12 | Harry Gillespie | 21 | Son | Shipper | Penna |
| 13 | John Gillespie | 20 | Son | Clerk | Penna |
| 14 | Raymond Gillespie | 18 | Son | Clerk | Penna |
| 15 | James Gillespie | 16 | Son | — | Penna |
| 16 | Stephen Gillespie | 14 | Son | — | Penna |
| 17 | Mary Gillespie | 12 | Daughter | — | Penna |
| 18 | Joseph B. Longmore | 52 | Head | Moulder | New Jersey |
| 19 | James Longmore | 32 | Son | Foreman | Penna |
| 20 | Joseph Longmore | 28 | Son | Moulder | Penna |
| 21 | John Longmore | 26 | Son | Moulder | Penna |
| 22 | Mary Longmore | 24 | Daughter | Inspector | Penna |
| 23 | Elizabeth Longmore | 22 | Daughter | Stenographer | Penna |
| 24 | James Gully | 52 | Head | Specialist | Penna |
| 25 | Mary Costello | 77 | Mother | — | Penna |
| 26 | Edward Costello | 52 | Brother | Salesman | Penna |
| 27 | Edward J. Costello | 24 | Boarder | Helper | England |
| 28 | John J. Costello | 35 | Boarder | Brakeman | Penna |
| 29 | John E. Sammons | 52 | Head | Hammerer | Delaware |
| 30 | Antoinette Sammons | 50 | Wife | — | Delaware |
| 31 | Margaret J. Sammons | 20 | Daughter | Saleslady | Delaware |
| 32 | Elizabeth Sammons | 16 | Daughter | Sales Lady | Delaware |
| 33 | Augusta Sammons | 13 | Daughter | — | Delaware |
| 34 | William H. Sammons | 77 | Father | — | Delaware |
| 35 | James Smith | 62 | Head | Motorman | North Ireland |
| 36 | Catherine Smith | 53 | Wife | — | North Ireland |
| 37 | James Smith | 28 | Son | Winder | Penna |
| 38 | Paul Smith | 26 | Son | Splicer | Penna |
| 39 | Anna Smith | 23 | Daughter | Saleslady | Penna |
| 40 | John Smith | 21 | Son | Helper | Penna |
| 41 | Frank Smith | 18 | Son | Knitter | Penna |
| 42 | Sadie Smith | 16 | Daughter | Saleslady | Penna |
| 43 | Edward Smith | 13 | Son | — | Penna |
| 44 | John Longley | 61 | Head | Broker | New York State |
| 45 | Elizabeth Longley | 39 | Wife | — | Michigan |
| 46 | Raymond Longley | 17 | Son | Messenger | Penna |
| 47 | John H. Longley | 13 | Son | — | Penna |
| 48 | Virginia Longley | 8 | Daughter | — | Penna |
| 49 | Elizabeth Longley | 5 | Daughter | — | Penna |
| 50 | William Longley | 3 | Son | — | Penna |
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)