JT
John Tierney — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this John Tierney across the 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 8-person household.
Age 13
b. ~1917
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Tierney |
| Given Name | John P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Vermont |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lowell City |
| Est. Birth Year | ~1917 |
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 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Gertrude Tierney | Daughter | — | 20 | ~1910 |
| Alice Tierney | Daughter | — | 22 | ~1908 |
| Edward Tierney | Son | — | 15 | ~1915 |
| John Tierney | Son | — | 13 | ~1917 |
| Ruth Tierney | Daughter | — | 17 | ~1913 |
| Lucinda Tierney | Spouse | — | 48 | ~1882 |
| Edward Tierney | Head | — | 54 | ~1876 |
| Dorothy Tierney | Daughter | — | 18 | ~1912 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 2
Middlesex, Massachusetts · implied b. ~1918 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Tierney |
| Given Name | John P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Vermont |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 13
Middlesex, Massachusetts · implied b. ~1917 — 8 household members
| Surname | Tierney |
| Given Name | John P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Vermont |
| Can Read/Write | Yes |
| 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 Tierney across 2 US Census years (1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
John Tierney
Son · 1930 · age 13 · b. ~1917 · Massachusetts
★ You are viewing this record
Sibling
Gertrude Tierney
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Tierney
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Tierney
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Tierney
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Tierney
Sibling · 1930 · age 22
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 — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel921:0925)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles C Drew | 54 | Head | Treasurer | Maine |
| 2 | Emma Drew | 50 | Wife | — | Maine |
| 3 | Jessie E Drew | 21 | Daughter | — | Maine |
| 4 | Emma B Drew | 20 | Daughter | Secretary | Maine |
| 5 | Isabelle Drew | 84 | Mother | — | Maine |
| 6 | Fredric P Morrison | 24 | Nephew | Clerk | Maine |
| 7 | John F Ambrose | 50 | Head | Captain | Massachusetts |
| 8 | Agnes J Ambrose | 51 | Wife | — | Massachusetts |
| 9 | Beatrice Ambrose | 19 | Daughter | — | Massachusetts |
| 10 | Arthur F Mcdermott | 58 | Head | Iceman | Massachusetts |
| 11 | Clara E Mcdermott | 57 | Wife | — | Massachusetts |
| 12 | Sarah J Mcdermott | 85 | Mother | — | New York |
| 13 | Catherine J Mcdermott | 44 | Sister | Mender | Massachusetts |
| 14 | Margaret F Howe | 52 | Head | Teacher | Massachusetts |
| 15 | Mary E Howe | 42 | Sister | Bookkeeper | Massachusetts |
| 16 | Charles J Howe | 44 | Brother | Public Health | Massachusetts |
| 17 | Abbie E Powers | 45 | Head | — | Massachusetts |
| 18 | Morris H Powers | 45 | Husband | Gen Clerk | Massachusetts |
| 19 | Morris H Powers | 17 | Son | — | Massachusetts |
| 20 | John J Powers | 15 | Son | — | Massachusetts |
| 21 | David L Donovan | 41 | Head | Musician | Massachusetts |
| 22 | Elizabeth Donovan | 26 | Wife | — | Massachusetts |
| 23 | Antonio Romero | 29 | Head | Clerk (Sales) | South America |
| 24 | Evelyn Romero | 30 | Wife | — | Massachusetts |
| 25 | Charles A Romero | 3 | Son | — | Massachusetts |
| 26 | Harrison S Bryan | 42 | Head | Architect | Massachusetts |
| 27 | Grace Bryan | 43 | Wife | — | Massachusetts |
| 28 | J Lillian Hadley | 70 | Mother-in-law | — | Massachusetts |
| 29 | Maria A Bryan | 70 | Head | — | Massachusetts |
| 30 | Nellie S Bryan | 56 | Sister | Assistant Lib | Massachusetts |
| 31 | George W Stewart | 70 | Head | (Retired) Mayor | New Hampshire |
| 32 | Elizabeth Stewart | 69 | Wife | — | New Hampshire |
| 33 | Raymond B Humphrey | 36 | Head | Real Estate | Massachusetts |
| 34 | Alida N Humphrey | 71 | Mother | — | Canada English |
| 35 | John J Allen | 54 | Head | Bookbinder | Massachusetts |
| 36 | Mabel Allen | 42 | Wife | — | Canada English |
| 37 | Mary Morgan | 53 | Servant | — | New York |
| 38 | Harriet Mcdonald | 39 | Head | Secretary | Massachusetts |
| 39 | Catherine Mcdonald | 35 | Sister | — | Massachusetts |
| 40 | Jane Reynolds | 81 | Roomer | — | Massachusetts |
| 41 | Edward Tierney | 54 | Head | Lawyer | Massachusetts |
| 42 | Lucinda Tierney | 48 | Wife | — | Vermont |
| 43 | Alice L Tierney | 22 | Daughter | — | Massachusetts |
| 44 | Gertrude Tierney | 20 | Daughter | — | Massachusetts |
| 45 | Dorothy Tierney | 18 | Daughter | — | Massachusetts |
| 46 | Ruth Tierney | 17 | Daughter | — | Massachusetts |
| 47 | Edward J Jr Tierney | 15 | Son | — | Massachusetts |
| 48 | John P Tierney THIS PERSON | 13 | Son | — | Massachusetts |
| 49 | John W Callahan | 28 | Head | Asst. Undertaker | Massachusetts |
| 50 | Ruth M Callahan | 24 | Wife | — | Massachusetts |
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)