HM
Helen Mccarthy — 1930 US Census Record
Model Tree available1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Helen Mccarthy across the 1910, 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed), with identified parents Eugene & John — first a daughter (b.~1907), then head of a 5-person household.
Age 23
b. ~1907
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | McCarthy |
| Given Name | Helen F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | Floor lady |
| Industry | Biscuit Company |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Floor Lady |
| Township / Ward | Watertown Town |
| Est. Birth Year | ~1907 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| Helen Mccarthy | Daughter | — | 23 | ~1907 |
| Dorothy Mccarthy | Daughter | — | 14 | ~1916 |
| Mary Mccarthy | Daughter | — | 17 | ~1913 |
| John Mccarthy | Head | — | 55 | ~1875 |
| Mary Mccarthy | Other | — | 47 | ~1883 |
Census Appearances
1910
Middlesex, Massachusetts
Daughter, age 1
Middlesex, Massachusetts · implied b. ~1909 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Daughter, age 11
Middlesex, Massachusetts · implied b. ~1909 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | Helen |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 23
Middlesex, Massachusetts · implied b. ~1907 — 5 household members
| Surname | McCarthy |
| Given Name | Helen F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Floor lady |
| Industry | Biscuit Company |
| 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 Helen Mccarthy across 3 US Census years (1910, 1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage. Identified parents: father Eugene Mccarthy (~0.92 confidence) and father John Mccarthy (~0.92 confidence) and mother Gertrude Mccarthy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Eugene Mccarthy
b. ~1859
Source father
● Household
· direct · ~0.92
Father
John Mccarthy
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Gertrude Mccarthy
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Mccarthy
Daughter · 1930 · age 23 · b. ~1907 · Massachusetts
★ You are viewing this record
Sibling
Mary Mccarthy
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Mccarthy
Sibling · 1930 · age 14
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 — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel931:0162)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Joseph Piaros | 11 | Son | — | Massachusetts |
| 52 | Stella Piaros | 9 | Daughter | — | Massachusetts |
| 53 | Vincenzo Massa | 40 | Head | Roofer | Italy |
| 54 | Lucia Massa | 41 | Wife-H | — | Italy |
| 55 | Concetta Massa | 12 | Daughter | — | Massachusetts |
| 56 | Rosario Massa | 11 | Son | — | Massachusetts |
| 57 | Philomena Massa | 9 | Daughter | — | Massachusetts |
| 58 | Carmella Massa | 7 | Daughter | — | Massachusetts |
| 59 | Vincenzo Massa | 5 | Son | — | Massachusetts |
| 60 | Joseph D'Antonio | 40 | Head | Contractor | Italy |
| 61 | Seraphina D'Antonio | 33 | Wife-H | — | Italy |
| 62 | Jennie A. D'Antonio | 16 | Daughter | — | Massachusetts |
| 63 | Shamer S. D'Antonio | 15 | Son | — | Massachusetts |
| 64 | Perinta D'Antonio | 13 | Daughter | — | Massachusetts |
| 65 | Anthony D'Antonio | 11 | Son | — | Massachusetts |
| 66 | Mary D'Antonio | 10 | Daughter | — | Massachusetts |
| 67 | Esther D'Antonio | 7 | Daughter | — | Massachusetts |
| 68 | Anna A. D'Antonio | 6 | Daughter | — | Massachusetts |
| 69 | Patrick J. O'Brien | 53 | Head | Laborer | Massachusetts |
| 70 | Mary A. O'Brien | 52 | Wife-H | — | Canada English |
| 71 | Mary C. O'Brien | 15 | Daughter | — | Massachusetts |
| 72 | John F. O'Brien | 9 | Son | — | Massachusetts |
| 73 | Helen O'Brien | 6 | Daughter | — | Massachusetts |
| 74 | Gustave Goede | 70 | Head | Fireman | Germany |
| 75 | Bertha E. Goede | 68 | Wife-H | — | Germany |
| 76 | Herbert W. Kuhr | 14 | Grandson | — | Massachusetts |
| 77 | Maurice J. Kelly | 44 | Head | — | Massachusetts |
| 78 | Florence A. Kelly | 37 | Wife-H | — | New York |
| 79 | Maurice J. Kelly | 15 | Son | — | Massachusetts |
| 80 | John F. Kelly | 14 | Son | — | Massachusetts |
| 81 | Joseph L. Kelly | 12 | Son | — | Massachusetts |
| 82 | Geneva A. Kelly | 10 | Daughter | — | Massachusetts |
| 83 | Mary J. Kelly | 67 | Mother | Housekeeper | Massachusetts |
| 84 | Thomas J. Flaherty | 44 | Head | Cutter | Irish Free State |
| 85 | Elizabeth Flaherty | 44 | Wife-H | — | Massachusetts |
| 86 | James F. Flaherty | 13 | Son | — | Massachusetts |
| 87 | John W. Flaherty | 11 | Son | — | Massachusetts |
| 88 | Bridget A. Riley | 70 | Head-H | — | Massachusetts |
| 89 | John G. Chiasson | 54 | Head | Janitor | Canada English |
| 90 | Evelyn G. Chiasson | 57 | Wife-H | — | England |
| 91 | Rose M. Maloney | 27 | Daughter | — | Canada English |
| 92 | Frank M. Maloney | 33 | Son in law | Clerk | Massachusetts |
| 93 | John F. Mccarthy | 55 | Head | Laborer | Massachusetts |
| 94 | Mary E. Mccarthy | 47 | Wife-H | — | Massachusetts |
| 95 | Helen F. Mccarthy THIS PERSON | 23 | Daughter | Floor Lady | Massachusetts |
| 96 | Mary E. Mccarthy | 17 | Daughter | Setting Up | Massachusetts |
| 97 | Dorothy R. Mccarthy | 14 | Daughter | — | Massachusetts |
| 98 | Nelson Hill | 84 | Head | — | Canada French |
| 99 | Olive Hill | 77 | Wife-H | — | Canada French |
| 100 | Matthew W. Conley | 39 | Son | Laborer | Massachusetts |
Pedigree Summary
Helen + 2 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)