MC
Mary Coughlin — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this Mary Coughlin across the 1930 and 1940 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 8-person household.
Age 13
b. ~1917
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | Coughlin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston 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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Joseph Coughlin | Son | — | 19 | ~1911 |
| Mary Coughlin | Daughter | — | 13 | ~1917 |
| Robert Gillespie | Other | — | 2 | ~1928 |
| Michael Coughlin | Head | — | 53 | ~1877 |
| Catherine Coughlin | Spouse | — | 52 | ~1878 |
| Frank Coughlin | Son | — | 31 | ~1899 |
| Ellen Coughlin | Daughter | — | 26 | ~1904 |
| Gertrude Gillespie | Daughter | — | 28 | ~1902 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 13
Suffolk, Massachusetts · implied b. ~1917 — 8 household members
| Surname | Coughlin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Other, age 23
Suffolk-County, Massachusetts · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cogliani |
| Given Name | Mary |
| Relationship to Head | Daughter-in-law |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Bookkeeper |
| Industry | Retail Dept Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 210 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| 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 Mary Coughlin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Coughlin
Daughter · 1930 · age 13 · b. ~1917 · Massachusetts
★ You are viewing this record
Sibling
Ellen Coughlin
Sibling · 1930 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Coughlin
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Coughlin
Sibling · 1930 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Gillespie
Sibling · 1930 · age 28
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 — Suffolk, Massachusetts
Open full size
1930 US Federal Census — Suffolk, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel941:0783)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Joseph Jewkes | 29 | Head | Manager | Massachusetts |
| 52 | Blanche Jewkes | 26 | Wife | — | Canada English |
| 53 | Blanche Jewkes | 5 | Daughter | — | Massachusetts |
| 54 | Bernard Burbine | 21 | Brother-in-law | Machine Operator | Canada English |
| 55 | Michael Hourigan | 53 | Head | Shipper | Massachusetts |
| 56 | Agnes M. Hourigan | 50 | Wife | — | Massachusetts |
| 57 | John L. Hourigan | 26 | Son | Musician | Massachusetts |
| 58 | Michael E. Coughlin | 53 | Head | Engineer | Massachusetts |
| 59 | Catherine M. Coughlin | 52 | Wife | — | Massachusetts |
| 60 | Frank J. Coughlin | 31 | Son | Clerk | Massachusetts |
| 61 | Gertrude M. Gillespie | 28 | Daughter | Cashier | Massachusetts |
| 62 | Ellen Coughlin | 26 | Daughter | — | Massachusetts |
| 63 | Joseph Coughlin | 19 | Son | Packer | Massachusetts |
| 64 | Mary Coughlin THIS PERSON | 13 | Daughter | — | Massachusetts |
| 65 | Robert Gillespie | 2 | Grandson | — | Massachusetts |
| 66 | Thomas Dolan | 30 | Head | Steam Fitter | Massachusetts |
| 67 | Margaret Dolan | 30 | Wife | — | Massachusetts |
| 68 | Katherine Dolan | 10 | Daughter | — | Massachusetts |
| 69 | Thomas E. Dolan | 6 | Son | — | Massachusetts |
| 70 | Dorothea Dolan | 2 | Daughter | — | Massachusetts |
| 71 | Joseph W. Fitzpatrick | 44 | Head | Chauffeur | Massachusetts |
| 72 | Anna L. Fitzpatrick | 40 | Wife | — | Massachusetts |
| 73 | Marie Fitzpatrick | 11 | Daughter | — | Massachusetts |
| 74 | Evelyn Fitzpatrick | 10 | Daughter | — | Massachusetts |
| 75 | Joseph Fitzpatrick | 9 | Son | — | Massachusetts |
| 76 | Anna Fitzpatrick | 8 | Daughter | — | Massachusetts |
| 77 | John Fitzpatrick | 7 | Son | — | Massachusetts |
| 78 | Irene Fitzpatrick | 5 | Daughter | — | Massachusetts |
| 79 | Eleanor Fitzpatrick | 4 | Daughter | — | Massachusetts |
| 80 | Claire Fitzpatrick | 2 | Daughter | — | Massachusetts |
| 81 | Frederick Joyce | 62 | Head | Cook | Canada French |
| 82 | Annie M. Joyce | 60 | Wife | — | Canada French |
| 83 | Clifford Joyce | 24 | Son | Locomotive Fireman | Massachusetts |
| 84 | Thomas Joyce | 22 | Son | Repairer | Massachusetts |
| 85 | Genevieve Joyce | 19 | Daughter | Asst Forelady | Massachusetts |
| 86 | Anna M. Joyce | 19 | Daughter | Examiner | Massachusetts |
| 87 | Murdock Poirier | 46 | Nephew | Brakeman | Canada French |
| 88 | Rangwill Hansen | 29 | Son-in-law | Salesman | Sweden |
| 89 | Andrew Hansen | 11 | Grandson | — | Massachusetts |
| 90 | Evelyn Hansen | 10 | Granddaughter | — | Massachusetts |
| 91 | Pauline Hansen | 8 | Granddaughter | — | Massachusetts |
| 92 | Richard Hansen | 7 | Grandson | — | Massachusetts |
| 93 | Jeanette Hansen | 5 | Granddaughter | — | Massachusetts |
| 94 | Katherine S. Casey | 43 | Head | Nurse | Ireland |
| 95 | Charles Clark | 57 | Head | Operator | Maine |
| 96 | Janet D. Clark | 47 | Wife | — | Canada English |
| 97 | Ruth E. Clark | 22 | Daughter | Secretary | Maine |
| 98 | Charles R. Clark | 20 | Son | Chemist | Maine |
| 99 | Doris E. Clark | 15 | Daughter | — | Maine |
| 100 | Willard D. Clark | 12 | Son | — | Maine |
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)