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 1920 and 1930 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1918), then head of a 9-person household.
Age 12
b. ~1918
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 | 12 |
| 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 | ~1918 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Joseph Coughlin | Son | — | 19 | ~1911 |
| Mary Coughlin | Other | — | 48 | ~1882 |
| Jeremiah Coughlin | Head | — | 52 | ~1878 |
| Daniel Coughlin | Son | — | 22 | ~1908 |
| Eileen Coughlin | Daughter | — | 10 | ~1920 |
| Mary Coughlin | Daughter | — | 12 | ~1918 |
| John Coughlin | Son | — | 14 | ~1916 |
| James Coughlin | Son | — | 16 | ~1914 |
| Raymond Coughlin | Son | — | 25 | ~1905 |
Census Appearances
1920
Suffolk, Massachusetts
Daughter, age 2
Suffolk, Massachusetts · implied b. ~1918 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coughlin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Daughter, age 12
Suffolk, Massachusetts · implied b. ~1918 — 9 household members
| Surname | Coughlin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| 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 |
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 (1920 and 1930) in Suffolk, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Coughlin
Daughter · 1930 · age 12 · b. ~1918 · Massachusetts
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Sibling
Raymond Coughlin
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Coughlin
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Coughlin
Sibling · 1930 · age 22
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
Eileen Coughlin
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Coughlin
Sibling · 1930 · age 16
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:massachusettscensus00reel957:0484)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | James Templeton | 32 | Son | Machinist | Massachusetts |
| 52 | Margaret Templeton | 26 | Daughter | Teacher | Massachusetts |
| 53 | Marion S. Templeton | 24 | Daughter | Clerk | Massachusetts |
| 54 | Agnes W. Templeton | 20 | Daughter | — | Massachusetts |
| 55 | Ralph Addonizio | 66 | Head | Pan Presser | Italy |
| 56 | Flora Addonizio | 67 | Wife-H | — | Italy |
| 57 | Albert Addonizio | 24 | Son | Baker | Massachusetts |
| 58 | Rose D. Addonizio | 22 | Daughter-in-law | — | Massachusetts |
| 59 | Rose F. Addonizio | 4 | G-Daughter | — | Massachusetts |
| 60 | Albert Addonizio | 1 | G-Son | — | Massachusetts |
| 61 | James Donahue | 42 | Head | Laborer | Northern Ireland |
| 62 | Mary G. Donahue | 40 | Wife | — | Northern Ireland |
| 63 | Mary J. Donahue | 20 | Daughter | Bookkeeper | Massachusetts |
| 64 | James J. Donahue | 18 | Son | Clerk | Massachusetts |
| 65 | Charles F. Donahue | 15 | Son | — | Massachusetts |
| 66 | Frances L. Donahue | 14 | Daughter | — | Massachusetts |
| 67 | Michael J. Donahue | 10 | Son | — | Massachusetts |
| 68 | Thomas J. Donahue | 8 | Son | — | Massachusetts |
| 69 | Dorothy J. Donahue | 6 | Daughter | — | Massachusetts |
| 70 | John J. Hafnagel | 30 | Head | Printer | Massachusetts |
| 71 | Nora B. Hafnagel | 26 | Wife-H | — | Massachusetts |
| 72 | John J. Jr. Hafnagel | 3 | Son | — | Massachusetts |
| 73 | Barbara M. Hafnagel | 1 | Daughter | — | Massachusetts |
| 74 | Ruth J. Nee | 18 | Sister-in-law | — | Massachusetts |
| 75 | Charles T. Hafnagel | 57 | Father | Brass Finisher | Massachusetts |
| 76 | William J. Saunders | 42 | Head | Buyer | Massachusetts |
| 77 | Everett Saunders | 20 | Son | Clerk | Massachusetts |
| 78 | Mildred Saunders | 18 | Daughter | — | Massachusetts |
| 79 | Myrtle E. Saunders | 16 | Daughter | — | Massachusetts |
| 80 | Ethel Saunders | 11 | Daughter | — | Massachusetts |
| 81 | David Burke | 32 | Head | Fireman | Massachusetts |
| 82 | Alice V. Burke | 35 | Wife-H | Stitcher | Massachusetts |
| 83 | Frederick J. Feeney | 32 | Head | Helper | Massachusetts |
| 84 | William K. Feeney | 31 | Wife-H | — | Massachusetts |
| 85 | Elizabeth J. Feeney | 5 | Daughter | — | Massachusetts |
| 86 | Olive M. Feeney | 4 | Daughter | — | Massachusetts |
| 87 | Abraham J. Abrahams | 43 | Head | Clerk | Massachusetts |
| 88 | Esther Abrahams | 52 | Sister | — | Massachusetts |
| 89 | Rosa Abrahams | 37 | Sister | — | Massachusetts |
| 90 | Sarah Abrahams | 35 | Sister | Bookkeeper | Massachusetts |
| 91 | Phoebe Abrahams | 17 | Niece | — | Massachusetts |
| 92 | Jeremiah F. Coughlin | 52 | Head | Printer | Massachusetts |
| 93 | Mary R. Coughlin | 48 | Wife-H | — | Massachusetts |
| 94 | Raymond Coughlin | 25 | Son | Pressman | Massachusetts |
| 95 | Daniel J. Coughlin | 22 | Son | Chauffeur | Massachusetts |
| 96 | Joseph G. Coughlin | 19 | Son | Chauffeur | Massachusetts |
| 97 | James A. Coughlin | 16 | Son | — | Massachusetts |
| 98 | John L. Coughlin | 14 | Son | — | Massachusetts |
| 99 | Mary Coughlin THIS PERSON | 12 | Daughter | — | Massachusetts |
| 100 | Eileen Coughlin | 10 | Daughter | — | 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)