MB
Mary Brennan — 1930 US Census Record
Model Tree available1930 United States Federal Census · Cuyahoga, Ohio
Our Model Tree links this Mary Brennan across the 1920, 1930 and 1940 US Censuses in Cuyahoga, Ohio (XGBoost, ~Confirmed), with identified parents William & William — first a daughter (b.~1912), then head of a 9-person household.
Age 18
b. ~1912
Female
Daughter
Born: Ohio
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cuyahoga, Ohio |
| Surname | Brennan |
| Given Name | Mary Agnes |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Occupation | Operator |
| Industry | Telephone |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Operator |
| Township / Ward | Cleveland City |
| Est. Birth Year | ~1912 |
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 |
|---|---|---|---|---|
| Loretta Brennan | Daughter | — | 15 | ~1915 |
| Virginia Brennan | Daughter | — | 12 | ~1918 |
| Madeline Brennan | Daughter | — | 9 | ~1921 |
| Kathleen Brennan | Daughter | — | 16 | ~1914 |
| Margaret Brennan | Daughter | — | 10 | ~1920 |
| Mary Brennan | Daughter | — | 18 | ~1912 |
| Patricia Brennan | Daughter | — | 3 | ~1927 |
| William Brennan | Head | — | 47 | ~1883 |
| Catherine Brennan | Other | — | 44 | ~1886 |
Census Appearances
1920
Cuyahoga, Ohio
Daughter, age 8
Cuyahoga, Ohio · implied b. ~1912 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Mary Agnes |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Cuyahoga, Ohio
Daughter, age 18
Cuyahoga, Ohio · implied b. ~1912 — 9 household members
| Surname | Brennan |
| Given Name | Mary Agnes |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Pennsylvania |
| Occupation | Operator |
| Industry | Telephone |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Cuyahoga-County, Ohio
Daughter, age 28
Cuyahoga-County, Ohio · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennon |
| Given Name | Mary Agnes |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cleveland |
| 1935 Residence (County) | Cuyahoga |
| Occupation | telephone operator |
| Industry | Ohio Bell Co |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 2425 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| 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 Brennan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Brennon (~0.92 confidence) and father William Brennan (~0.92 confidence) and mother Katherine Brennon (~0.92 confidence) and mother Catherine Brennan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Brennon
b. ~1883
Source father
● Household
· direct · ~0.92
Father
William Brennan
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Katherine Brennon
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Catherine Brennan
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Brennan
Daughter · 1930 · age 18 · b. ~1912 · Ohio
★ You are viewing this record
Sibling
Patricia Brennan
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Brennan
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Loretta Brennan
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Madeline Brennan
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Brennan
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Brennan
Sibling · 1930 · age 12
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 — Cuyahoga, Ohio
Open full size
1930 US Federal Census — Cuyahoga, Ohio
Page Contents
46 people indexed on this census page (ia:1930:ohiocensus00reel1776:0780)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Peter Fahrney | 62 | Head | Conductor | Switzerland |
| 2 | Anna Fahrney | 53 | Wife-H | — | Wisconsin |
| 3 | Ida Steinke | 57 | Head-HR | Seamstress | Germany |
| 4 | Louis Thorne | 76 | Lodger | — | Germany |
| 5 | Frank C. Hill | 31 | Head | Commercial Artist | New York |
| 6 | Retha Hill | 28 | Wife-H | Bookkeeper | Michigan |
| 7 | James Tuttle | 59 | Father-in-law | — | Ohio |
| 8 | Elizabeth Richey | 64 | Head-H | — | Pennsylvania |
| 9 | Robert A. Richey | 16 | Son | Draftsman | Pennsylvania |
| 10 | Harry F. Enderson | 47 | Lodger | Salesman | Indiana |
| 11 | Grover Lathrop | 38 | Lodger | Rate Clerk | Iowa |
| 12 | James F. Mcclellan | 40 | Head | Paint-Maker | Minnesota |
| 13 | Elizabeth Mcclellan | 38 | Wife-H | Accountant | Michigan |
| 14 | John Ward | 34 | Head | Salesman | New York |
| 15 | Agnes Ward | 33 | Wife-H | — | New York |
| 16 | Walter G. Welsh | 33 | Head | Steamfitter | Ohio |
| 17 | Florence Welsh | 32 | Wife-H | — | New York |
| 18 | Ewald F. Breitig | 51 | Head | Foreman | Germany |
| 19 | Augusta Breitig | 52 | Wife-H | — | Germany |
| 20 | Robert Breitig | 19 | Son | — | Ohio |
| 21 | Marian Breitig | 19 | Daughter | — | Ohio |
| 22 | Charles F. Schultis | 55 | Head | Superintendent | New York |
| 23 | Margaret Schultis | 54 | Wife-H | — | Ohio |
| 24 | Earl Schultis | 26 | Son | Tool-Maker | Ohio |
| 25 | Mildred Schultis | 24 | Daughter | Stenographer | Ohio |
| 26 | Marion Schultis | 21 | Daughter | Stenographer | Ohio |
| 27 | Lucile Schultis | 21 | Daughter | Stenographer | Ohio |
| 28 | Harold Schultis | 21 | Son | Asst. Manager | Ohio |
| 29 | Eleanor Schultis | 19 | Daughter | — | Ohio |
| 30 | William V. Brennan | 47 | Head | Tool-Maker | Ohio |
| 31 | Catherine Brennan | 44 | Wife-H | — | Pennsylvania |
| 32 | Mary Agnes Brennan THIS PERSON | 18 | Daughter | Operator | Ohio |
| 33 | Kathleen Brennan | 16 | Daughter | — | Ohio |
| 34 | Loretta Brennan | 15 | Daughter | — | Ohio |
| 35 | Virginia Brennan | 12 | Daughter | — | Ohio |
| 36 | Margaret Brennan | 10 | Daughter | — | Ohio |
| 37 | Madeline Brennan | 9 | Daughter | — | Ohio |
| 38 | Patricia Brennan | 3 | Daughter | — | Ohio |
| 39 | Samuel D. Magid | 30 | Head | Proprietor | Lithuania |
| 40 | Hilda Magid | 26 | Wife-H | — | Ohio |
| 41 | Russel Magid | 6 | Son | — | Ohio |
| 42 | Elizabeth Mckisson | 42 | Head-HR | Servant | Ohio |
| 43 | Joseph Magad | 58 | Head | Watchman | Lithuania |
| 44 | Dora Magad | 58 | Wife-H | — | Lithuania |
| 45 | William Ungar | 35 | Lodger | Tailor | Czechoslovakia |
| 46 | Rosie Ungar | 27 | Lodger | Servant | Czechoslovakia |
Related Census Records
Pedigree Summary
Mary + 6 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)