MJ
Margaret Johnston — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this Margaret Johnston across the 1930 and 1940 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 9-person household.
Age 10
b. ~1920
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | Johnston |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New Brunswick |
| Mother's Birthplace | New Brunswick |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | City Of Boston |
| Est. Birth Year | ~1920 |
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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| Joan Johnston | Daughter | — | 1 | ~1929 |
| Nora Johnston | Daughter | — | 8 | ~1922 |
| Thomas Johnston | Head | — | 44 | ~1886 |
| Dorothy Johnston | Daughter | — | 2 | ~1928 |
| Mary Johnston | Daughter | — | 12 | ~1918 |
| Thomas Johnston | Son | — | 4 | ~1926 |
| John Johnston | Son | — | 13 | ~1917 |
| Margaret Johnston | Daughter | — | 10 | ~1920 |
| Hannah Johnston | Spouse | — | 39 | ~1891 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 10
Suffolk, Massachusetts · implied b. ~1920 — 9 household members
| Surname | Johnston |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New Brunswick |
| Mother's Birthplace | New Brunswick |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 21
Suffolk-County, Massachusetts · implied b. ~1919 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Mary V. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Title Examiner |
| Industry | Life Insurance |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 1200 |
| 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 Margaret Johnston across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Margaret Johnston
Daughter · 1930 · age 10 · b. ~1920 · Massachusetts
★ You are viewing this record
Sibling
Dorothy Johnston
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Johnston
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joan Johnston
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nora Johnston
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Johnston
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Johnston
Sibling · 1930 · age 13
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:massachusettscensus00reel947:0357)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary C. O'Hearn | 67 | Head | — | Massachusetts |
| 2 | Catherine G. Corkery | 43 | Daughter | — | Massachusetts |
| 3 | Frank M. Corkery | 61 | Brother | Decorator | Massachusetts |
| 4 | Lillian Scott | 32 | Daughter | — | Massachusetts |
| 5 | Thomas J. O'Hearn | 23 | Son | Clerk | Massachusetts |
| 6 | James G. Scott | 12 | Grandson | — | Massachusetts |
| 7 | Mary Mulley | 38 | Lodger | Laundress | New Brunswick |
| 8 | Edward H. Donahue | 29 | Head | Chauffeur | Massachusetts |
| 9 | Anna M. Donahue | 23 | Wife | — | Massachusetts |
| 10 | Anna M. Donahue | 2 | Daughter | — | Massachusetts |
| 11 | Theresa L. Donahue | 1 | Daughter | — | Massachusetts |
| 12 | Edward J. Jr. Donahue | 0 | Son | — | Massachusetts |
| 13 | Anna L. Hollan | 22 | Roomer | Laundress | Massachusetts |
| 14 | — | None | — | — | — |
| 15 | — | None | — | — | — |
| 16 | Ellen J. Sullivan | 69 | Head | — | New Brunswick |
| 17 | Thomas F. Johnston | 44 | Head | Carpenter | New Brunswick |
| 18 | Hannah M. Johnston | 39 | Wife | — | New Brunswick |
| 19 | John G. Johnston | 13 | Son | — | Massachusetts |
| 20 | Mary G. Johnston | 12 | Daughter | — | Massachusetts |
| 21 | Margaret Johnston THIS PERSON | 10 | Daughter | — | Massachusetts |
| 22 | Nora J. Johnston | 8 | Daughter | — | Massachusetts |
| 23 | Thomas F. Jr. Johnston | 4 | Son | — | Massachusetts |
| 24 | Dorothy Johnston | 2 | Daughter | — | Massachusetts |
| 25 | Joan Johnston | 1 | Daughter | — | Massachusetts |
| 26 | Richard R. Kenneally | 26 | Head | Clerk | Massachusetts |
| 27 | Nora C. Kenneally | 24 | Wife | — | New Brunswick |
| 28 | Richard J. Kenneally | 0 | Son | — | Massachusetts |
| 29 | James Lyons | 51 | Head | — | New Brunswick |
| 30 | Catherine J. Lyons | 31 | Daughter | — | New Brunswick |
| 31 | Francis J. Lyons | 4 | Grandson | — | Massachusetts |
| 32 | John Watson | 47 | Head | Baker | Scotland |
| 33 | Bridget Watson | 47 | Wife | — | New Brunswick |
| 34 | Edward F. Keenan | 27 | Head | Artist | Massachusetts |
| 35 | Evelyn M. Keenan | 20 | Wife | Typist | Massachusetts |
| 36 | Arthur S. Lewis | 35 | Head | Agent | Massachusetts |
| 37 | Mary Lewis | 28 | Wife | — | New Brunswick |
| 38 | Margaret Lewis | 3 | Daughter | — | Massachusetts |
| 39 | Stuart H. Mail | 53 | Head | New Agent | Massachusetts |
| 40 | Mary Mail | 47 | Wife | — | Massachusetts |
| 41 | Stuart H. Jr. Mail | 25 | Son | Waiter | Massachusetts |
| 42 | Mary Mail | 21 | Daughter | Clerk | Massachusetts |
| 43 | Isabel L. Mail | 16 | Daughter | — | Massachusetts |
| 44 | Margaret C. Mail | 12 | Daughter | — | Massachusetts |
| 45 | Dorothy J. Mail | 11 | Daughter | — | Massachusetts |
| 46 | Jeremiah J. Mulcahy | 62 | Head | Janitor | Massachusetts |
| 47 | Nora M. Mulcahy | 65 | Wife | — | New Brunswick |
| 48 | Timothy J. Mulcahy | 31 | Son | Lawyer | Massachusetts |
| 49 | Shirley M. Mulcahy | 25 | Daughter | Operator | Massachusetts |
| 50 | George J. Mulcahy | 22 | Son | Assembler | 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)