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Mary Monahan — 1940 US Census Record
Model Tree available1940 United States Federal Census · New-York-County, New York
Our Model Tree links this Mary Monahan across the 1920, 1930 and 1940 US Censuses in New-York-County, New York (XGBoost, ~Confirmed), with identified parents Mortimer & Amelia — first a daughter (b.~1908), then head of a 3-person household.
Age 32
b. ~1908
Female
Daughter
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | New-York-County, New York |
| Surname | Monahan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | New York |
| Additional Details | |
| Occupation | Switchboard Opr |
| Industry | Underwriter |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 1456 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Switchboard Opr |
| Township / Ward | New York City |
| Est. Birth Year | ~1908 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mortimer Monahan | Son | — | 30 | ~1910 |
| Mary Monahan | Head | — | 57 | ~1883 |
| Mary Monahan | Daughter | — | 32 | ~1908 |
Census Appearances
1920
New York, …
Daughter, age 12
New York, New York · implied b. ~1908 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monahan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
New York, …
Daughter, age 22
New York, New York · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monahan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Bookkeeper |
| Industry | Theater Bureau |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
New-York-County, New …
Daughter, age 32
New-York-County, New York · implied b. ~1908 — 3 household members
| Surname | Monahan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | New York |
| Occupation | Switchboard Opr |
| Industry | Underwriter |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 1456 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 Monahan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Mortimer Monahan (~0.92 confidence) and mother Amelia Monahan (~0.92 confidence) and mother Mary Monahan (~0.92 confidence) and mother Mary Monahan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Mortimer Monahan
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Amelia Monahan
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Mary Monahan
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Mary Monahan
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Monahan
Daughter · 1940 · age 32 · b. ~1908 · New York
★ You are viewing this record
Sibling
Mortimer Monahan
Sibling · 1940 · age 30
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 — New-York-County, New York
Open full size
1940 US Federal Census — New-York-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02630-00214)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Amelia Schaeffel | 41 | Head | Housekeeper | Russia |
| 42 | Hilda Grathwohl | 39 | Lodger | — | New York |
| 43 | Bernard Mcconnell | 37 | Lodger | Elevator Opr | Ireland |
| 44 | David Serra | 27 | Lodger | Singer | Portugal |
| 45 | Fred Wagner | 59 | Lodger | Shipping Clerk | New York |
| 46 | Sam Smolinsky | 37 | Lodger | Chauffeur | England |
| 47 | Herbert Kennedy | 35 | Lodger | Unskilled Laborer | England |
| 48 | Louis Schleuber | 29 | Lodger | — | Penn. |
| 49 | Louis Purtill | 46 | Lodger | Shipping Clerk | Alabama |
| 50 | Victor Krison | 40 | Lodger | Salesman | Greece |
| 51 | John William Terry | 29 | Head | Clerk | New York |
| 52 | Anna Terry | 29 | Wife | — | New York |
| 53 | Mary Del Vecchio | 46 | Head | Housekeeper | Italy |
| 54 | Theresa Del Vecchio | 17 | Daughter | — | New York |
| 55 | Michael Del Vecchio | 14 | Son | — | New York |
| 56 | Sam Schwartzberg | 29 | Lodger | Teacher | New York |
| 57 | Anton Hahn | 32 | Lodger | Iron Worker | Germany |
| 58 | Charles Hackett | 37 | Lodger | Shipping Clerk | Penn. |
| 59 | Martin Cullen | 37 | Lodger | Longshoreman | New York |
| 60 | John Doris | 42 | Head | Cook | Italy |
| 61 | Angelina Doris | 46 | Wife | — | Italy |
| 62 | Elmer Brower | 17 | Lodger | Dishwasher | Tennessee |
| 63 | Frederic Abbey | 19 | Lodger | Errand Boy | St. Louis |
| 64 | Barbara Saelhens | 45 | Lodger | Matron | Belgium |
| 65 | Nick Togateas | 37 | Lodger | Cook | Greece |
| 66 | Earl Starkey | 51 | Head | Proprietor | West Virginia |
| 67 | Jane Starkey | 52 | Wife | — | Conn. |
| 68 | Caroline Sherwood | 68 | Mother-in-law | — | Conn. |
| 69 | Mary Monahan | 57 | Head | — | Ireland |
| 70 | Mary Monahan THIS PERSON | 32 | Daughter | Switchboard Opr | New York |
| 71 | Mortimer Monahan | 30 | Son | Chauffeur | New York |
| 72 | Joseph Jacky | 48 | Head | Proprietor | New York |
| 73 | Celia Jacky | 46 | Wife | Secy. Secretary | New York |
| 74 | Bertha Jacky | 15 | Daughter | — | New York |
| 75 | Nettie Begis | 21 | Servant | Servant | Penn. |
| 76 | Raoul Chabot | 32 | Head | Elevator Opr. | Canada |
| 77 | Georgette Chabot | 30 | Wife | — | Vermont |
| 78 | Claire Chabot | 2 | Daughter | — | New York |
| 79 | Nathan Golubitzky | 48 | Head | Loomer | Russia |
| 80 | Tettie Golubitzky | 48 | Wife | Housekeeper | Russia |
Related Census Records
Pedigree Summary
Mary + 1 sibling
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 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)