MC
Mary Connolly — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this Mary Connolly across the 1910 and 1920 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1902), then head of a 12-person household.
Age 18
b. ~1902
Female
Daughter
Born: Massachusetts
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Suffolk, Massachusetts |
| Surname | Connolly |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Clerk |
| Industry | Barber Supplies |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Clerk |
| Township / Ward | Boston City |
| Est. Birth Year | ~1902 |
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.
12 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| James Connolly | Son | — | 9 | ~1911 |
| Annie Connolly | Daughter | — | 17 | ~1903 |
| Dorothy Connolly | Daughter | — | 5 | ~1915 |
| Peter Connolly | Son | — | 12 | ~1908 |
| Mary Connolly | Daughter | — | 18 | ~1902 |
| Daniel Connolly | Son | — | 7 | ~1913 |
| Thomas Connolly | Son | — | 10 | ~1910 |
| Catherine Connolly | Daughter | — | 15 | ~1905 |
| Daniel Connolly | Head | — | 45 | ~1875 |
| William Connolly | Son | — | 3 | ~1917 |
| Ruth Connolly | Daughter | — | 1 | ~1919 |
| Mary Connolly | Spouse | — | 42 | ~1878 |
Census Appearances
1910
Suffolk, Massachusetts
Daughter, age 9
Suffolk, Massachusetts · implied b. ~1901 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connolly |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Suffolk, Massachusetts
Daughter, age 18
Suffolk, Massachusetts · implied b. ~1902 — 12 household members
| Surname | Connolly |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Clerk |
| Industry | Barber Supplies |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | 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 2 US Census years (1910 and 1920) in Suffolk, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Connolly
Daughter · 1920 · age 18 · b. ~1902 · Massachusetts
★ You are viewing this record
Sibling
Daniel Connolly
Sibling · 1920 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Connolly
Sibling · 1920 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Connolly
Sibling · 1920 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Annie Connolly
Sibling · 1920 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Connolly
Sibling · 1920 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Peter Connolly
Sibling · 1920 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Connolly
Sibling · 1920 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Connolly
Sibling · 1920 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Connolly
Sibling · 1920 · age 9
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:1920:14thcensusofpopu739unit:0979)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Mulrey | 30 | Wife | — | Ireland |
| 2 | Mary Mulrey | 9 | Daughter | — | Massachusetts |
| 3 | Rose Mulrey | 4 | Daughter | — | Massachusetts |
| 4 | Alice Mulrey | 3 | Daughter | — | Massachusetts |
| 5 | Margaret Mulrey | 2 | Daughter | — | Massachusetts |
| 6 | Stephen A Sullivan | 34 | Head | Fireman | Ireland |
| 7 | Catherine Sullivan | 27 | Wife | — | England |
| 8 | Catherine Sullivan | 4 | Daughter | — | Massachusetts |
| 9 | Helen Sullivan | 2 | Daughter | — | Massachusetts |
| 10 | Winifred Sullivan | 1 | Daughter | — | Massachusetts |
| 11 | John J Mcdonald | 39 | Head | Fireman | Massachusetts |
| 12 | Mary Mcdonald | 36 | Wife | — | Ireland |
| 13 | Lawrence H Mcdonald | 8 | Son | — | Massachusetts |
| 14 | John F Harrington | 50 | Head | Clerk | Massachusetts |
| 15 | Maude A Harrington | 45 | Wife | — | New Hampshire |
| 16 | Lloyd F Harrington | 23 | Son | Clerk | Massachusetts |
| 17 | Frank Harrington | 46 | Brother | Shipper | Massachusetts |
| 18 | Cordia Johnson | 73 | Mother-in-law | — | Vermont |
| 19 | Clarence L Scholpp | 25 | Head | Clerk | Massachusetts |
| 20 | Minnie A Scholpp | 51 | Mother | — | New York |
| 21 | Sophie A Scholpp | 23 | Sister | Bookkeeper | Massachusetts |
| 22 | James W Scholpp | 18 | Brother | — | Massachusetts |
| 23 | Robert S Scholpp | 14 | Brother | — | Massachusetts |
| 24 | Vinnie Lynch | 26 | Lodger | Bookkeeper | Massachusetts |
| 25 | Francis Packard | 46 | Head | Manager | Maine |
| 26 | Jessie R Packard | 39 | Wife | Social Worker | Massachusetts |
| 27 | Russell S Packard | 15 | Son | — | Massachusetts |
| 28 | Barbara S Packard | 12 | Daughter | — | Massachusetts |
| 29 | Patrick Rahney | 60 | Head | Case Maker | Ireland |
| 30 | Catherine Rahney | 56 | Wife | — | Ireland |
| 31 | Agnes Rahney | 29 | Daughter | — | Ireland |
| 32 | Thomas J Rahney | 25 | Son | — | Ireland |
| 33 | Mary A Rahney | 23 | Daughter | Saleslady | Ireland |
| 34 | Patrick J Rahney | 22 | Son | Machinist | Ireland |
| 35 | Catherine Rahney | 18 | Daughter | Operator | Ireland |
| 36 | Sarah Rahney | 17 | Daughter | Operator | Ireland |
| 37 | Harry S Waterman | 41 | Head | Manager | Massachusetts |
| 38 | Mary Waterman | 43 | Wife | — | Massachusetts |
| 39 | Daniel Connolly | 45 | Head | Laborer | Ireland |
| 40 | Mary M Connolly | 42 | Wife | — | Ireland |
| 41 | Mary E Connolly THIS PERSON | 18 | Daughter | Clerk | Massachusetts |
| 42 | Annie E Connolly | 17 | Daughter | Packer | Massachusetts |
| 43 | Catherine G Connolly | 15 | Daughter | — | Massachusetts |
| 44 | Peter F Connolly | 12 | Son | — | Massachusetts |
| 45 | Thomas J Connolly | 10 | Son | — | Massachusetts |
| 46 | James L Connolly | 9 | Son | — | Massachusetts |
| 47 | Daniel L Connolly | 7 | Son | — | Massachusetts |
| 48 | Dorothy A Connolly | 5 | Daughter | — | Massachusetts |
| 49 | William H Connolly | 3 | Son | — | Massachusetts |
| 50 | Ruth M Connolly | 1 | Daughter | — | Massachusetts |
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)