MC
Mary Connolly — 1920 US Census Record
Model Tree available1920 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this Mary Connolly across the 1910, 1920 and 1930 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed), with identified parents James & Elizabeth — first a daughter (b.~1911), then head of a 7-person household.
Age 9
b. ~1911
Female
Daughter
Born: Massachusetts
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Suffolk, Massachusetts |
| Surname | Connolly |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | South Boston District |
| Est. Birth Year | ~1911 |
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.
7 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Francis Connolly | Son | — | 12 | ~1908 |
| Mary Mccarthy | Other | — | 74 | ~1846 |
| James Connolly | Son | — | 14 | ~1906 |
| William Connolly | Son | — | 16 | ~1904 |
| James Connolly | Head | — | 41 | ~1879 |
| Mary Connolly | Daughter | — | 9 | ~1911 |
| Marion Connolly | Daughter | — | 7 | ~1913 |
Census Appearances
1910
Suffolk, Massachusetts
Daughter, age
Suffolk, Massachusetts · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connolly |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Suffolk, Massachusetts
Daughter, age 9
Suffolk, Massachusetts · implied b. ~1911 — 7 household members
| Surname | Connolly |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
Daughter, age 20
Suffolk, Massachusetts · implied b. ~1910 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connelly |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Reporter |
| Industry | Silk mill |
| Class of Worker | W |
| 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 Connolly across 3 US Census years (1910, 1920 and 1930) in Suffolk, Massachusetts, using XGBoost record linkage. Identified parents: father James Connolly (~0.92 confidence) and mother Elizabeth Connolly (~0.92 confidence) and father Michael Connolly (~0.92 confidence) and father Thomas Connelly (~0.92 confidence) and mother Emma Connelly (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Connolly
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Connolly
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
Michael Connolly
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Thomas Connelly
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Emma Connelly
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Connolly
Daughter · 1920 · age 9 · b. ~1911 · Massachusetts
★ You are viewing this record
Sibling
William Connolly
Sibling · 1920 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Connolly
Sibling · 1920 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Connolly
Sibling · 1920 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marion Connolly
Sibling · 1920 · age 7
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
1920 US Federal Census — Suffolk, Massachusetts
Open full size
1920 US Federal Census — Suffolk, Massachusetts
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu734unit:0061)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Patrick Hart | 29 | Brother | Trainman | Ireland |
| 52 | James Connolly | 41 | Head | Sorter | Massachusetts |
| 53 | William Connolly | 16 | Son | Asst. Shipper | Massachusetts |
| 54 | James Connolly | 14 | Son | Errand Boy | Massachusetts |
| 55 | Francis Connolly | 12 | Son | None | Massachusetts |
| 56 | Mary Connolly THIS PERSON | 9 | Daughter | None | Massachusetts |
| 57 | Marion Connolly | 7 | Daughter | None | Massachusetts |
| 58 | Mary Mccarthy | 74 | Mother in law | None | Ireland |
| 59 | John Daley | 40 | Head | None | Ireland |
| 60 | Nora Daley | 40 | Daughter | Machine Operator | Ireland |
| 61 | Margaret Daley | 36 | Daughter | Book Keeper | Ireland |
| 62 | Arthur Egan | 31 | Head | Switchboard Oper. | Massachusetts |
| 63 | Theresa Egan | 32 | Wife | None | Massachusetts |
| 64 | Katherine Egan | 3 | Daughter | None | Massachusetts |
| 65 | Eleanor Egan | 2 | Daughter | None | Massachusetts |
| 66 | Sidney Watkins | 36 | Head | Machinist | Wales |
| 67 | Veronica Watkins | 32 | Wife | None | Massachusetts |
| 68 | Edward Watkins | 7 | Son | None | Massachusetts |
| 69 | Paul Watkins | 5 | Son | None | Massachusetts |
| 70 | Sidney Jr. Watkins | 2 | Son | None | Massachusetts |
| 71 | Mary Walmsley | 45 | Head | None | Ireland |
| 72 | Mary B. Walmsley | 11 | Daughter | None | Massachusetts |
| 73 | Nora Walmsley | 9 | Daughter | None | Massachusetts |
| 74 | Ruth Walmsley | 8 | Daughter | None | Massachusetts |
| 75 | Frederick Walmsley | 7 | Son | None | Massachusetts |
| 76 | Julia Lynch | 65 | Head | None | Massachusetts |
| 77 | Jeremiah Lynch | 26 | Son | Broker | Massachusetts |
| 78 | Katherine Monahan | 50 | Head | Housekeeper | Ireland |
| 79 | Daniel Monahan | 25 | Son | Printer | Massachusetts |
| 80 | Margaret Monahan | 22 | Daughter | Operator | Massachusetts |
| 81 | Mary Monahan | 20 | Daughter | Clerical | Massachusetts |
| 82 | Peter Monahan | 16 | Son | None | Massachusetts |
| 83 | James Monahan | 13 | Son | None | Massachusetts |
| 84 | Frederick Knapp | 73 | Head | Lathe Hand | Massachusetts |
| 85 | Mary Knapp | 73 | Wife | None | Massachusetts |
| 86 | Lauffen Knapp | 47 | Son | Steamfitter | Massachusetts |
| 87 | Ellen J. Horan | 55 | Head | Dressmaker | Ireland |
| 88 | Grace Horan | 31 | Daughter | Typist | Massachusetts |
| 89 | Frederick J. Evans | 30 | Boarder | Clerk | Massachusetts |
| 90 | George Emmons | 38 | Head | Laborer | Massachusetts |
| 91 | Jennie Emmons | 34 | Sister | Sorter | Massachusetts |
| 92 | Annie Doyle | 48 | Head | None | Ireland |
| 93 | Mary Doyle | 24 | Daughter | Machine Operator | Massachusetts |
| 94 | Edward Doyle | 22 | Son | Chauffeur | Massachusetts |
| 95 | Anna Doyle | 18 | Daughter | Sealer | Massachusetts |
| 96 | Mary Callahan | 24 | Niece | Forelady | Massachusetts |
| 97 | Donato Pasalacqua | 34 | Head | Coal Dealer | Italy |
| 98 | Jack Vina | 41 | Boarder | Laborer | Italy |
| 99 | Mary Mcmanus | 56 | Head | None | Massachusetts |
| 100 | Theresa Mcmanus | 25 | Daughter | Saleslady | Massachusetts |
Related Census Records
Pedigree Summary
Mary + 4 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)