JM
James Mccarthy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this James Mccarthy across the 1930 and 1940 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1904), then head of a 9-person household.
Age 26
b. ~1904
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | McCarthy |
| Given Name | James F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New York |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lowell City |
| Est. Birth Year | ~1904 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Agnes Mccarthy | Daughter | — | 23 | ~1907 |
| Mary Mccarthy | Daughter | — | 35 | ~1895 |
| Grace Mccarthy | Daughter | — | 21 | ~1909 |
| Anna Mccarthy | Daughter | — | 19 | ~1911 |
| Charles Mccarthy | Head | — | 62 | ~1868 |
| Bridget Mccarthy | Other | — | 62 | ~1868 |
| James Mccarthy | Son | — | 26 | ~1904 |
| Dennis Mccarthy | Son | — | 31 | ~1899 |
| John Mccarthy | Son | — | 33 | ~1897 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 26
Middlesex, Massachusetts · implied b. ~1904 — 9 household members
| Surname | McCarthy |
| Given Name | James F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New York |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Norfolk-County, Massachusetts
Head, age 36
Norfolk-County, Massachusetts · implied b. ~1904 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarty |
| Given Name | James F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Brookline |
| 1935 Residence (County) | Norfolk |
| Highest Grade | H-2 |
| 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 James Mccarthy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Mccarthy
Son · 1930 · age 26 · b. ~1904 · Massachusetts
★ You are viewing this record
Sibling
Anna Mccarthy
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mccarthy
Sibling · 1930 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Mccarthy
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dennis Mccarthy
Sibling · 1930 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Mccarthy
Sibling · 1930 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mccarthy
Sibling · 1930 · age 35
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
44 people indexed on this census page (ia:1930:massachusettscensus00reel920:0869)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John F. Tracey | 27 | Head | Chef | Massachusetts |
| 2 | Mildred Tracey | 26 | Wife-H | — | Massachusetts |
| 3 | Mildred F. Tracey | 5 | Daughter | — | Massachusetts |
| 4 | John F. Jr. Tracey | 3 | Son | — | Massachusetts |
| 5 | Gertrude Tracey | 1 | Daughter | — | Massachusetts |
| 6 | Wallace Mcquirk | 22 | Head | Truck Driver | Massachusetts |
| 7 | Emily Mcquirk | 22 | Wife-H | — | Massachusetts |
| 8 | Wallace R. Mcquirk | 0 | Son | — | Massachusetts |
| 9 | Thomas Cairns | 37 | Head | Elevator | Massachusetts |
| 10 | Florence L. Cairns | 13 | Daughter | — | Massachusetts |
| 11 | Ethel Cairns | 6 | Daughter | — | Massachusetts |
| 12 | Arthur J. Thomas | 30 | Boarder | Millwright | Massachusetts |
| 13 | Francis Rodriguez | 41 | Head | Operative | Spain |
| 14 | Bernice H. Rodriguez | 36 | Wife-H | — | Vermont |
| 15 | Ernest Provencal | 55 | Head | Operative | Massachusetts |
| 16 | Catherine T. Provencal | 50 | Wife-H | — | Massachusetts |
| 17 | Caroline Provencal | 15 | Daughter | — | Massachusetts |
| 18 | John Vincent | 33 | Head | Cutter | Belgium |
| 19 | Rose Vincent | 32 | Wife-H | — | Massachusetts |
| 20 | Robert J. Vincent | 5 | Son | — | Massachusetts |
| 21 | Archie Young | 55 | Head | Machinist | Scotland |
| 22 | Alice Young | 54 | Wife-H | — | New Hampshire |
| 23 | Harry Griffith | 53 | Boarder | Foreman | England |
| 24 | Charles J. Mccarthy | 62 | Head | Sodder | New York |
| 25 | Bridget A. Mccarthy | 62 | Wife-H | — | Irish Free State |
| 26 | Mary F. Mccarthy | 35 | Daughter | Stitcher | Massachusetts |
| 27 | John J. Mccarthy | 33 | Son | Stitcher | Massachusetts |
| 28 | Dennis T. Mccarthy | 31 | Son | Stitcher | Massachusetts |
| 29 | James F. Mccarthy THIS PERSON | 26 | Son | — | Massachusetts |
| 30 | Agnes F. Mccarthy | 23 | Daughter | — | Massachusetts |
| 31 | Grace Mccarthy | 21 | Daughter | — | Massachusetts |
| 32 | Anna R. Mccarthy | 19 | Daughter | — | Massachusetts |
| 33 | Louis Cunliffe | 67 | Head | — | Vermont |
| 34 | Myrtle Cunliffe | 65 | Wife-H | Packer | Massachusetts |
| 35 | Eliza J. Stephens | 53 | Head | — | Massachusetts |
| 36 | Sarah Henderson | 50 | Boarder | Accountant | Massachusetts |
| 37 | John F. Dickinson | 58 | Head | Miller | Massachusetts |
| 38 | Annie G. Dickinson | 50 | Wife-H | — | Massachusetts |
| 39 | James G. Dickinson | 13 | Son | — | Massachusetts |
| 40 | Elizabeth Kelman | 60 | Head | — | Scotland |
| 41 | Isabel A. Kelman | 38 | Daughter | Drawer | Massachusetts |
| 42 | Annie S. Kelman | 33 | Daughter | Bookkeeper | Massachusetts |
| 43 | Edith Kelman | 31 | Daughter | Dressmaker | Massachusetts |
| 44 | Sadie Kelman | 28 | Daughter | Drawer | 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)