MC
Mary Cahill — 1930 US Census Record
Linked across censuses1930 United States Federal Census · New York, New York
Our Model Tree links this Mary Cahill across the 1910, 1920 and 1930 US Censuses in New York, New York (XGBoost, ~Confirmed) — first a head (b.~1887), then head of a 4-person household.
Age 43
b. ~1887
Female
Head
Born: Ireland
Widowed
1930 Census Record Details
| Census Year | 1930 |
| Location | New York, New York |
| Surname | Cahill |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1907 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 30 |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | New York City |
| Est. Birth Year | ~1887 |
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 |
|---|---|---|---|---|
| Patrick Cahill | Son | — | 9 | ~1921 |
| Margaret Cahill | Daughter | — | 13 | ~1917 |
| Mary Cahill | Head | — | 43 | ~1887 |
| Cornelius Cahill | Son | — | 11 | ~1919 |
Census Appearances
1910
New York, …
Other, age 21
New York, New York · implied b. ~1889 — 35 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cahill |
| Given Name | Mary |
| Relationship to Head | Servant |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1907 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Servant |
| Industry | House |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
New York, …
Other, age 32
New York, New York · implied b. ~1888 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cahill |
| Given Name | May |
| Relationship to Head | Servant |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1906 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Chambermaid |
| Industry | Private Fam |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1919 |
| Birthplace (normalized) | ireland |
1930
New York, …
Head, age 43
New York, New York · implied b. ~1887 — 4 household members
| Surname | Cahill |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1907 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 30 |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Cahill across 3 US Census years (1910, 1920 and 1930) in New York, New York, using XGBoost record linkage.
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This person
Anchor record
Mary Cahill
Head · 1930 · age 43 · b. ~1887 · New York
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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 — New York, New York
Open full size
1930 US Federal Census — New York, New York
Page Contents
50 people indexed on this census page (ia:1930:newyorkcensus00reel1544:0569)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Morris Zinerman | 30 | Head | Chauffeur | Russia |
| 2 | Esther Zinerman | 27 | Wife | — | Russia |
| 3 | Laya Zinerman | 8 | Daughter | — | New York |
| 4 | Pauline Zinerman | 5 | Daughter | — | New York |
| 5 | Edith Zinerman | 3 | Daughter | — | New York |
| 6 | Hyman Siegel | 35 | Head | Laborer | Russia |
| 7 | Mollie Siegel | 34 | Wife | — | Russia |
| 8 | Milton Siegel | 7 | Son | — | New York |
| 9 | Elias Siegel | 4 | Son | — | New York |
| 10 | Annie Muskin | 67 | Head | — | Russia |
| 11 | Feya Muskin | 32 | Daughter | Designer | Russia |
| 12 | Mary Muskin | 29 | Daughter | Nurse | Russia |
| 13 | Anne Muskin | 26 | Daughter | Secretary | Russia |
| 14 | Adelaide Muskin | 7 | Grand-daughter | — | New York |
| 15 | Mary Cahill THIS PERSON | 43 | Head | — | Ireland |
| 16 | Margaret Cahill | 13 | Daughter | — | New York |
| 17 | Cornelius Cahill | 11 | Son | — | New York |
| 18 | Patrick Cahill | 9 | Son | — | New York |
| 19 | Bertha Peterson | 49 | Head | — | Norway |
| 20 | Beatrice Peterson | 20 | Daughter | Waitress | Norway |
| 21 | Virginia Musselmann | 27 | Head | — | Virginia |
| 22 | Jean Rosborough | 28 | Partner | Secretary | Illinois |
| 23 | Nathan Diamond | 43 | Head | Laborer | Russia |
| 24 | Lillie Diamond | 40 | Wife | — | Russia |
| 25 | Anna Frank | 64 | Head | — | Poland |
| 26 | Ida Kessle | 50 | Partner | — | Russia |
| 27 | John Schultz | 30 | Head | Loader | New York |
| 28 | Mary Schultz | 24 | Wife | — | New York |
| 29 | Raymond Schultz | 6 | Son | — | New York |
| 30 | John Schultz | 5 | Son | — | New York |
| 31 | Dorothy Schultz | 3 | Daughter | — | New York |
| 32 | Charles Schultz | 2 | Son | — | New York |
| 33 | Betsy Holtzman | 70 | Head | — | Poland |
| 34 | Fanny Holtzman | 32 | Daughter | Finisher | New York |
| 35 | Max Brodsky | 28 | Head | Tinsmith | Russia |
| 36 | Sarah Brodsky | 24 | Wife | — | Poland |
| 37 | Ethel Brodsky | 2 | Daughter | — | New York |
| 38 | Henry Brodsky | 1 | Daughter | — | New York |
| 39 | Maurice Dornfeld | 36 | Head | Proprietor | Poland |
| 40 | Ann Dornfeld | 30 | Wife | — | Poland |
| 41 | Carl Dornfeld | 1 | Son | — | New York |
| 42 | John Cody | 30 | Head | Chauffeur | New York |
| 43 | Josephine Cody | 21 | Wife | — | New York |
| 44 | Patrick Cody | 3 | Son | — | New York |
| 45 | George Murphy | 37 | Head | Watchman | New York |
| 46 | Lillian Murphy | 37 | Wife | Laborer | New York |
| 47 | William Murphy | 15 | Son | — | New York |
| 48 | Charles Kaback | 48 | Head | Proprietor | Russia |
| 49 | Sarah Kaback | 41 | Wife | — | Russia |
| 50 | William Kaback | 15 | Son | — | New York |
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)