JC
John Callahan — 1930 US Census Record
Model Tree available1930 United States Federal Census · Essex, Massachusetts
Our Model Tree links this John Callahan across the 1910, 1920 and 1930 US Censuses in Essex, Massachusetts (XGBoost, ~Confirmed), with identified parents John & Ellen — first a son (b.~1908), then head of a 4-person household.
Age 22
b. ~1908
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Essex, Massachusetts |
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | Laborer |
| Industry | Leather Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Laborer |
| Township / Ward | Salem Mass 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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Callahan | Daughter | — | 14 | ~1916 |
| James Callahan | Head | — | 57 | ~1873 |
| Maud Callahan | Other | — | 47 | ~1883 |
| John Callahan | Son | — | 22 | ~1908 |
Census Appearances
1910
Essex, Massachusetts
Son, age 2
Essex, Massachusetts · implied b. ~1908 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Essex, Massachusetts
Son, age 11
Essex, Massachusetts · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Son, age 22
Essex, Massachusetts · implied b. ~1908 — 4 household members
| Surname | Callahan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Laborer |
| Industry | Leather Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 John Callahan across 3 US Census years (1910, 1920 and 1930) in Essex, Massachusetts, using XGBoost record linkage. Identified parents: father John Callahan (~0.92 confidence) and mother Ellen Callahan (~0.92 confidence) and father Jeremiah Callahan (~0.92 confidence) and mother Elizabeth Callahan (~0.92 confidence) and father James Callahan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Callahan
b. ~1867
Source father
● Household
· direct · ~0.92
Mother
Ellen Callahan
b. ~1868
Source mother
● Household
· direct · ~0.92
Father
Jeremiah Callahan
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Callahan
b. ~1872
Source mother
● Household
· direct · ~0.92
Father
James Callahan
b. ~1873
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Callahan
Son · 1930 · age 22 · b. ~1908 · Massachusetts
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Sibling
Mary Callahan
Sibling · 1930 · age 14
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 — Essex, Massachusetts
Open full size
1930 US Federal Census — Essex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel902:1100)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Joseph Malauska | 52 | Head | Can Maker | Russia |
| 52 | Bernice Malauska | 47 | Wife-H | None | Russia |
| 53 | John Malauska | 21 | Son | Trimmer | Russia |
| 54 | Paul Malauska | 18 | Son | None | Russia |
| 55 | Mary Malauska | 16 | Daughter | None | Russia |
| 56 | Kachadoor Mardirosian | 46 | Head | Cleaner | Turkey |
| 57 | Sarah Mardirosian | 42 | Wife-H | None | Turkey |
| 58 | Mishan Mardirosian | 18 | Son | None | Turkey |
| 59 | James J. Callahan | 57 | Head | Shoemaker | Massachusetts |
| 60 | Maud Callahan | 47 | Wife-H | None | Massachusetts |
| 61 | John Callahan THIS PERSON | 22 | Son | Laborer | Massachusetts |
| 62 | Mary E. Callahan | 14 | Daughter | None | Massachusetts |
| 63 | Michael Konopnicki | 75 | Head | Finisher | Russia |
| 64 | Mikaela Konopnicki | 42 | Wife-H | None | Russia |
| 65 | Stanley Konopnicki | 15 | son | None | Massachusetts |
| 66 | John Konopnicki | 13 | son | None | Massachusetts |
| 67 | Josephine Konopnicki | 9 | Daughter | None | Massachusetts |
| 68 | Beline Konopnicki | 7 | son | None | Massachusetts |
| 69 | Betty Konopnicki | 6 | Daughter | None | Massachusetts |
| 70 | Joseph Konopnicki | 3 | son | None | Massachusetts |
| 71 | Ruth Muryaka | 15 | Lodger | None | New York |
| 72 | Frank H. Bonsly | 46 | Head | Watchman | Maine |
| 73 | Adella Bonsly | 54 | Wife-H | None | Maine |
| 74 | Ellen Carroll | 65 | Head | None | Irish Free State |
| 75 | Julia Mcmahon | 46 | Head | None | Irish Free State |
| 76 | Mary Mcmahon | 22 | Daughter | None | Massachusetts |
| 77 | Wilfred Bessette | 26 | Head | Laborer | Massachusetts |
| 78 | Irene Bessette | 24 | Wife-H | None | New Hampshire |
| 79 | Lorraine Bessette | 3 | Daughter | None | Massachusetts |
| 80 | Roland W. Bessette | 1 | son | None | Massachusetts |
| 81 | Patrick H. O'Brien | 63 | Head | Beamer | Massachusetts |
| 82 | James O'Brien | 45 | Wife-H | None | Irish Free State |
| 83 | Kathryn O'Brien | 20 | Daughter | Bookkeeping | Massachusetts |
| 84 | Michael Madden | 55 | Brother | Laborer | New Hampshire |
| 85 | James J. Clark | 48 | Head | Salesman | Massachusetts |
| 86 | Catherine Clark | 50 | sister-H | None | Massachusetts |
| 87 | Margaret Clark | 48 | sister | None | Massachusetts |
| 88 | Elizabeth Highland | 55 | Head-H | None | Massachusetts |
| 89 | Nellie F. Highland | 53 | sister | Needle Worker | Massachusetts |
| 90 | Mary J. Highland | 49 | sister | None | Massachusetts |
| 91 | John Quinn | 67 | Head | None | Massachusetts |
| 92 | Sarah Quinn | 37 | daughter | Needle Worker | Massachusetts |
| 93 | Nellie Quinn | 35 | daughter | Shoe Maker | Massachusetts |
| 94 | Lillian Quinn | 28 | daughter | None | Massachusetts |
| 95 | Edmund Siavel | 30 | Head | Finisher | Massachusetts |
| 96 | Florence Siavel | 29 | Wife-H | None | Massachusetts |
| 97 | Dorothy Siavel | 6 | daughter | None | Massachusetts |
| 98 | Robert Siavel | 3 | son | None | Massachusetts |
| 99 | Leonard Siavel | 1 | son | None | Massachusetts |
| 100 | — | None | — | — | — |
Pedigree Summary
John + 1 sibling
Gen 1 · 5 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)