MC
Margaret Callahan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Margaret Callahan across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed), with identified parents Edward & Catherine — first a daughter (b.~1913), then head of a 8-person household.
Age 27
b. ~1913
Female
Daughter
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Callahan |
| Given Name | Margaret V. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Lab. Clerk |
| Industry | Chemical Co. |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | 8 |
| 1935 Residence | New York |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Lab. Clerk |
| Township / Ward | New York City |
| Est. Birth Year | ~1913 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Edward Callahan | Head | — | 56 | ~1884 |
| Margaret Callahan | Daughter | — | 27 | ~1913 |
| Joseph Callahan | Son | — | 26 | ~1914 |
| Catherine Callahan | Spouse | — | 54 | ~1886 |
| Ernest Smith | Other | — | 43 | ~1897 |
| John Callahan | Other | — | 46 | ~1894 |
| Thomas Callahan | Son | — | 20 | ~1920 |
| Mary Callahan | Daughter | — | 24 | ~1916 |
Census Appearances
1920
Kings, New …
Daughter, age 7
Kings, New York · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Margaret |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Kings, New …
Daughter, age 17
Kings, New York · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | Operator |
| Industry | Retail Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Daughter, age 27
Kings-County, New York · implied b. ~1913 — 8 household members
| Surname | Callahan |
| Given Name | Margaret V. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Occupation | Lab. Clerk |
| Industry | Chemical Co. |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | 8 |
| 1935 Residence | New York |
| 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 Margaret Callahan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Edward Callahan (~0.92 confidence) and mother Catherine Callahan (~0.92 confidence) and mother Mary Callahan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edward Callahan
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Catherine Callahan
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Mary Callahan
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Callahan
Daughter · 1940 · age 27 · b. ~1913 · New York
★ You are viewing this record
Sibling
Thomas Callahan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Callahan
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Callahan
Sibling · 1940 · age 24
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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02581-00696)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edward A. Hughes | 18 | Son | Jr. Laborer | New York |
| 2 | Raymond H. Hughes | 17 | Son | No | New York |
| 3 | Lillian I. Halvorsen | 24 | Sister | No | New York |
| 4 | Thomas A. Halvorsen | 8 | Nephew | No | New York |
| 5 | Alice M. Halvorsen | 6 | Niece | No | New York |
| 6 | Sarah M. Sullivan | 63 | Head | Cafeteria Head | Penna. |
| 7 | Della A. Sullivan | 68 | Sister | No | Ireland |
| 8 | Joseph T. Sullivan | 28 | Nephew | Auditor | Penna. |
| 9 | Jack K. Chung | 54 | Head | Lawyer'S Asst. | China |
| 10 | Winnie W. Chung | 43 | Wife | No | China |
| 11 | Edward R. Chung | 15 | Son | No | New York |
| 12 | Doris M. Chung | 12 | Daughter | No | New York |
| 13 | Anne Vostly | 48 | Maid | Household Maid | Czechoslovakia |
| 14 | Bartholomew F. Bunke | 64 | Head | Brass Worker | Canada-Eng |
| 15 | Grace G. Bunke | 63 | Wife | No | New York |
| 16 | George F. Jordan | 65 | Lodger | Die Maker | New York |
| 17 | Menina Marazzini | 43 | Head | Secretary | New York |
| 18 | Bernadette C. Nichols | 31 | Sister | No | New York |
| 19 | Bernard J. Marazzini | 29 | Brother | Publicity Man | New York |
| 20 | John O'Brien | 31 | Nephew | Delivery Boy | Ireland |
| 21 | Bernard Marazzini | 68 | Father | No | Italy |
| 22 | Mary C. Marazzini | 68 | Mother | No | Ireland |
| 23 | Patricia Nichols | 2 | Niece | No | New York |
| 24 | Nadette Nichols | 0 | Niece | No | New York |
| 25 | Patrick J. Fahy | 65 | Head | Elevator Opr. | Ireland |
| 26 | Bessie T. Fahy | 62 | Wife | No | Ireland |
| 27 | Margaret M. Fahy | 27 | Daughter | Secy | New York |
| 28 | Norma B. Fahy | 25 | Daughter | Clerk | New York |
| 29 | Elizabeth R. Fahy | 23 | Daughter | Clerk | New York |
| 30 | Edna J. Fahy | 19 | Daughter | Steno | New York |
| 31 | Victoria Hayes | 45 | Head | Singer | New York |
| 32 | Emma Hayes | 72 | Mother | No | New York |
| 33 | Edward T. Callahan | 56 | Head | Motorman | Ireland |
| 34 | Catherine Callahan | 54 | Wife | No | Ireland |
| 35 | Margaret V. Callahan THIS PERSON | 27 | Daughter | Lab. Clerk | New York |
| 36 | Joseph M. Callahan | 26 | Son | Order Clerk | New York |
| 37 | Mary B. Callahan | 24 | Daughter | Clerk | New York |
| 38 | Thomas B. Callahan | 20 | Son | No | New York |
| 39 | John J. Callahan | 46 | Brother | Truck Helper | Ireland |
| 40 | Ernest Smith | 43 | Brother-in-law | Motorman | New York |
Pedigree Summary
Margaret + 3 siblings
Gen 1 · 3 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)