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John Monahan — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Union, New Jersey
Our Model Tree links this John Monahan across the 1920 and 1930 US Censuses in Union, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1908), then head of a 9-person household.
Age 22
b. ~1908
Male
Son
Born: New Jersey
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Union, New Jersey |
| Surname | Monahan |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Additional Details | |
| Occupation | Instructor |
| Industry | Public School |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Instructor |
| Township / Ward | Elizabeth 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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Edward Monahan | Son | — | 24 | ~1906 |
| John Monahan | Son | — | 22 | ~1908 |
| Anna Monahan | Daughter | — | 20 | ~1910 |
| Raymond Monahan | Son | — | 14 | ~1916 |
| Joseph Monahan | Son | — | 16 | ~1914 |
| Anna Monahan | Spouse | — | 48 | ~1882 |
| Catherine Monahan | Daughter | — | 18 | ~1912 |
| John Monahan | Head | — | 52 | ~1878 |
| James Monahan | Son | — | 12 | ~1918 |
Census Appearances
1920
Union, New …
Son, age 12
Union, New Jersey · implied b. ~1908 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monahan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Union, New …
Son, age 22
Union, New Jersey · implied b. ~1908 — 9 household members
| Surname | Monahan |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Instructor |
| Industry | Public School |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Monahan across 2 US Census years (1920 and 1930) in Union, New Jersey, using XGBoost record linkage.
Show:
This person
Anchor record
John Monahan
Son · 1930 · age 22 · b. ~1908 · New Jersey
★ You are viewing this record
Sibling
Catherine Monahan
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Monahan
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Monahan
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Monahan
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Monahan
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Monahan
Sibling · 1930 · 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
1930 US Federal Census — Union, New Jersey
Open full size
1930 US Federal Census — Union, New Jersey
Page Contents
50 people indexed on this census page (ia:1930:newjerseycensus00reel1387:0334)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | John Monahan | 52 | Head | Loc. Engineer | New Jersey |
| 52 | Anna Monahan | 48 | Wife | — | New Jersey |
| 53 | Edward Monahan | 24 | Son | — | New Jersey |
| 54 | John Jr. Monahan THIS PERSON | 22 | Son | Instructor | New Jersey |
| 55 | Anna Monahan | 20 | Daughter | — | New Jersey |
| 56 | Catherine Monahan | 18 | Daughter | Office Clerk | New Jersey |
| 57 | Joseph Monahan | 16 | Son | Office Work | New Jersey |
| 58 | Raymond Monahan | 14 | Son | — | New Jersey |
| 59 | James Monahan | 12 | Son | — | New Jersey |
| 60 | Jane Broadwater | 52 | Head | — | Maryland |
| 61 | James Broadwater | 24 | Son | — | New Jersey |
| 62 | Thomas Hutchinson | 34 | Lodger | — | Irish Free State |
| 63 | Clarence Slayton | 24 | Lodger | — | New Jersey |
| 64 | James Slayton | 22 | Lodger | — | New Jersey |
| 65 | Katie Baird | 54 | Head | — | New Jersey |
| 66 | Harold Baird | 29 | Son | — | New Jersey |
| 67 | Rose Baird | 30 | Daughter-in-law | — | New Jersey |
| 68 | Evelyn Baird | 1 | Granddaughter | — | New Jersey |
| 69 | Ralph J. Baird | 0 | Grandson | — | New Jersey |
| 70 | Charles Hankinson | 46 | Head | — | New Jersey |
| 71 | Margaret Hankinson | 42 | Wife | — | New Jersey |
| 72 | James Locum | 72 | Father-in-law | — | New Jersey |
| 73 | Theresa Locum | 72 | Mother-in-law | — | New Jersey |
| 74 | Karl Schossig | 44 | Head | Machinist | Denmark |
| 75 | Astrid Schossig | 45 | Wife | — | Denmark |
| 76 | Gerda Schossig | 13 | Daughter | — | Denmark |
| 77 | Eileen Schossig | 9 | Daughter | — | Denmark |
| 78 | Theodore Morris | 57 | Head | — | New Jersey |
| 79 | Margaret Morris | 50 | Wife | — | New York |
| 80 | Francis Lurina | 19 | Lodger | — | Pennsylvania |
| 81 | Joseph Lurina | 21 | Lodger | — | Pennsylvania |
| 82 | Edward Lurina | 16 | Lodger | — | Pennsylvania |
| 83 | Paul Lurina | 51 | Lodger | — | Irish Free State |
| 84 | William O'Brien | 57 | Lodger | — | New York |
| 85 | David Merritt | 77 | Head | — | Pennsylvania |
| 86 | Katie Merritt | 62 | Wife | — | Irish Free State |
| 87 | Thomas Ware | 59 | Head | — | Irish Free State |
| 88 | Catherine Ware | 55 | Wife | — | Irish Free State |
| 89 | Thomas Jr. Ware | 12 | Son | — | New Jersey |
| 90 | Mary Hard | 41 | Head | — | Irish Free State |
| 91 | Henry Smith | 53 | Lodger | — | New York |
| 92 | Raymond Dauger | 29 | Head | Laborer | New Jersey |
| 93 | Marion Dauger | 29 | Wife | Saleslady | New Jersey |
| 94 | Alice Dauger | 5 | Daughter | — | New Jersey |
| 95 | Freda Dauger | 3 | Daughter | — | New Jersey |
| 96 | William Martinson | 52 | Head | Manager | New Jersey |
| 97 | Bessie Martinson | 53 | Wife | — | New York |
| 98 | Jacob Levy | 54 | Head | Tailor | Russia |
| 99 | Anna Levy | 50 | Wife | — | Russia |
| 100 | Ida Levy | 25 | Daughter | Teacher | Pennsylvania |
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)