MC
Mary Connolly — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Montgomery, Ohio
Our Model Tree links this Mary Connolly across the 1920, 1930 and 1940 US Censuses in Montgomery, Ohio (XGBoost, ~Confirmed) — first a spouse (b.~1865), then head of a 4-person household.
Age 65
b. ~1865
Female
Spouse
Born: Ohio
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Montgomery, Ohio |
| Surname | Connolly |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 28 |
| Father's Birthplace | Northern Ireland |
| Mother's Birthplace | Northern Ireland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Dayton City |
| Est. Birth Year | ~1865 |
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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Florence Connolly | Son | — | 32 | ~1898 |
| Mary Connolly | Spouse | — | 65 | ~1865 |
| James Connolly | Son | — | 24 | ~1906 |
| William Connolly | Head | — | 64 | ~1866 |
Census Appearances
1920
Montgomery, Ohio
Spouse, age 55
Montgomery, Ohio · implied b. ~1865 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connolly |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Ohio |
| Father's Birthplace | Ireland |
| Mother's Birthplace | English |
| Occupation | Yes |
| Can Read | English |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Ireland |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Montgomery, Ohio
Spouse, age 65
Montgomery, Ohio · implied b. ~1865 — 4 household members
| Surname | Connolly |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 28 |
| Father's Birthplace | Northern Ireland |
| Mother's Birthplace | Northern Ireland |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
Head, age 76
Montgomery-County, Ohio · implied b. ~1864 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connelly |
| Given Name | Mary A |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 76 |
| Marital Status | Widowed |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton City |
| 1935 Residence (County) | Montgomery |
| Class of Worker | 0 |
| Highest Grade | No H-1 |
| 1935 Residence | Same House |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Connolly
Spouse · 1930 · age 65 · b. ~1865 · Ohio
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Montgomery, Ohio
Open full size
1930 US Federal Census — Montgomery, Ohio
Page Contents
50 people indexed on this census page (ia:1930:ohiocensus00reel1855:0485)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph J. Kefauver | 56 | Head | Electrician | Ohio |
| 2 | Jeannette C. Kefauver | 50 | Wife | — | Ohio |
| 3 | Mary E. Kefauver | 25 | Daughter | — | Ohio |
| 4 | Thomas J. Kefauver | 21 | Son | — | Ohio |
| 5 | Rose M. Kefauver | 17 | Daughter | — | Ohio |
| 6 | George P. Mccurdie | 49 | Head | Tool Maker | Pennsylvania |
| 7 | Mary E. Mccurdie | 49 | Wife | — | Pennsylvania |
| 8 | William J. White | 49 | Head | Stock Keeper | Kentucky |
| 9 | Ellis A. White | 48 | Wife | — | Ohio |
| 10 | Claudine F. White | 19 | Daughter | Operator | Kentucky |
| 11 | Robert F. Buntner | 36 | Head | Machinist | Ohio |
| 12 | Esther M. Buntner | 34 | Wife | — | Ohio |
| 13 | Robert K. Buntner | 2 | Son | — | Ohio |
| 14 | Jean J. Buntner | 1 | Daughter | — | Ohio |
| 15 | William F. Connolly | 64 | Head | Carpenter | Ohio |
| 16 | Mary A. Connolly THIS PERSON | 65 | Wife | — | Ohio |
| 17 | Florence W. Connolly | 32 | Son | Laborer | Ohio |
| 18 | James D. Connolly | 24 | Son | Laborer | Ohio |
| 19 | William D. Heimsch | 44 | Head | Salesman | Ohio |
| 20 | Nora E. Heimsch | 44 | Wife | — | Ohio |
| 21 | Alfred L. Langen | 35 | Head | Manager | Ohio |
| 22 | Irene C. Langen | 35 | Wife | — | Illinois |
| 23 | George W. Langen | 11 | Son | — | Ohio |
| 24 | Mary C. Langen | 8 | Daughter | — | Ohio |
| 25 | Elizabeth M. Brinkman | 68 | Head | — | Ohio |
| 26 | Helen R. Brinkman | 36 | Daughter | Machinist | Ohio |
| 27 | Henrietta Rose | 29 | Roomer | Machinist | Ohio |
| 28 | Fredrick J. Kuhns | 51 | Head | Plasterer | Ohio |
| 29 | Fredrick J. Kuhns | 10 | Son | — | Ohio |
| 30 | Joseph Kuhns | 26 | Son | Assembler | Ohio |
| 31 | Howard Kuhns | 23 | Son | D. P. Press Operator | Ohio |
| 32 | Elwood Kuhns | 18 | Son | Butcher Hand | Ohio |
| 33 | Clifford L. Fischbach | 47 | Head | Polisher | Ohio |
| 34 | Dorothy M. Fischbach | 42 | Wife | — | Ohio |
| 35 | Adelaide C. Fischbach | 14 | Daughter | — | Ohio |
| 36 | John C. Golub | 45 | Head | Repairman | Germany |
| 37 | Clara M. Golub | 34 | Wife | — | Virginia |
| 38 | John E. Golub | 2 | Son | — | Ohio |
| 39 | Frank W. Adams | 32 | Head | Woodworker | Ohio |
| 40 | Bernice Adams | 30 | Wife | — | Ohio |
| 41 | Norman Adams | 10 | Son | — | Ohio |
| 42 | Kenneth E. Hamilton | 31 | Head | Salesman | Ohio |
| 43 | Dorothy M. Hamilton | 27 | Wife | Stenographer | Ohio |
| 44 | William Holtapple | 23 | Lodger | Salesman | Ohio |
| 45 | Bernard J. Neville | 23 | Lodger | Clerk | Ohio |
| 46 | Edward J. Hughes | 23 | Head | — | Kentucky |
| 47 | Edward J. Hughes | 23 | Son | — | Kentucky |
| 48 | (Blank) (Blank) | None | (blank) | (Blank) | (blank) |
| 49 | (Blank) (Blank) | None | (blank) | (Blank) | (blank) |
| 50 | (Blank) (Blank) | None | (blank) | (Blank) | (blank) |
Related Census Records
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)