RC
Robert Carroll — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this Robert Carroll across the 1920 and 1930 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1909), then head of a 9-person household.
Age 21
b. ~1909
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | Carroll |
| Given Name | Robert J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | Draftsman |
| Industry | Electrical |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Draftsman |
| Township / Ward | Boston City |
| Est. Birth Year | ~1909 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Carroll | Son | — | 12 | ~1918 |
| James Carroll | Son | — | 23 | ~1907 |
| Mary Carroll | Spouse | — | 50 | ~1880 |
| Alfred Carroll | Son | — | 19 | ~1911 |
| Gertrude Carroll | Daughter | — | 17 | ~1913 |
| Robert Carroll | Son | — | 21 | ~1909 |
| William Carroll | Son | — | 25 | ~1905 |
| John Carroll | Head | — | 52 | ~1878 |
| Genevieve Carroll | Daughter | — | 15 | ~1915 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 11
Suffolk, Massachusetts · implied b. ~1909 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | England |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 21
Suffolk, Massachusetts · implied b. ~1909 — 9 household members
| Surname | Carroll |
| Given Name | Robert J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Massachusetts |
| Occupation | Draftsman |
| Industry | Electrical |
| 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 Robert Carroll across 2 US Census years (1920 and 1930) in Suffolk, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Carroll
Son · 1930 · age 21 · b. ~1909 · Massachusetts
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Sibling
James Carroll
Sibling · 1930 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Carroll
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Carroll
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Genevieve Carroll
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Carroll
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Carroll
Sibling · 1930 · age 12
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
24 people indexed on this census page (ia:1930:massachusettscensus00reel956:0113)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Donald R. Smith | 6 | Son | None | New Hampshire |
| 52 | Barbara L. Smith | 4 | Daughter | None | Massachusetts |
| 53 | Gordon A. Smith | 2 | Son | None | Massachusetts |
| 54 | James J. Carabin | 30 | Head | Foreman | Massachusetts |
| 55 | Marion E. Carabin | 27 | Wife | None | Massachusetts |
| 56 | Edith M. Carabin | 3 | Daughter | None | Massachusetts |
| 57 | Ruth E. Carabin | 1 | Daughter | None | Massachusetts |
| 58 | John E. Carabin | 0 | Son | None | Massachusetts |
| 59 | Elijah E. Flover | 51 | Head | Printer | Virginia |
| 60 | Edith Flover | 36 | Wife | Retail Merchant | Massachusetts |
| 61 | Winifred H. Flover | 16 | Daughter | None | Massachusetts |
| 62 | Alden E. Flover | 14 | Son | None | Massachusetts |
| 63 | Marion E. Flover | 12 | Daughter | None | Massachusetts |
| 64 | Herbert G. Flover | 11 | Son | None | Massachusetts |
| 65 | Joseph E. Flover | 9 | Son | None | Massachusetts |
| 66 | John E. Carroll | 52 | Head | Pusher | Illinois |
| 67 | Mary M. Carroll | 50 | Wife | None | Massachusetts |
| 68 | William J. Carroll | 25 | Son | Repair Man | Massachusetts |
| 69 | James J. Carroll | 23 | Son | Laborer | Massachusetts |
| 70 | Robert J. Carroll THIS PERSON | 21 | Son | Draftsman | Massachusetts |
| 71 | Alfred M. Carroll | 19 | Son | Shipper | Massachusetts |
| 72 | Gertrude H. Carroll | 17 | Daughter | None | Massachusetts |
| 73 | Genevieve L. Carroll | 15 | Daughter | None | Massachusetts |
| 74 | Robert G. Carroll | 12 | Son | None | Massachusetts |
Related Census Records
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)