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John Mann — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this John Mann across the 1930 and 1940 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 9-person household.
Age 7
b. ~1923
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | Mann |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1923 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mann | Other | — | 29 | ~1901 |
| John Mann | Son | — | 7 | ~1923 |
| John Mann | Head | — | 31 | ~1899 |
| Frances Mann | Daughter | — | 1 | ~1929 |
| George Mann | Son | — | 4 | ~1926 |
| James Mann | Son | — | ~1930 | |
| Clarence Mann | Other | — | 19 | ~1911 |
| Margaret Mann | Daughter | — | 3 | ~1927 |
| Robert Mann | Son | — | 5 | ~1925 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 7
Suffolk, Massachusetts · implied b. ~1923 — 9 household members
| Surname | Mann |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 17
Suffolk-County, Massachusetts · implied b. ~1923 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mawn |
| Given Name | John J Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Industry | No |
| Highest Grade | H-3 |
| 1935 Residence | Massachusetts |
| 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 John Mann across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mann
Son · 1930 · age 7 · b. ~1923 · Massachusetts
★ You are viewing this record
Sibling
Margaret Mann
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Mann
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Mann
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mann
Sibling · 1930 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mann
Sibling · 1930 · age 5
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
50 people indexed on this census page (ia:1930:massachusettscensus00reel947:0510)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna O'Donnell | 6 | Daughter | — | Massachusetts |
| 2 | Michael J. O'Donnell | 3 | Son | — | Massachusetts |
| 3 | William J. Mattocks | 33 | Head | Machinist | Scotland |
| 4 | Mabel I. Mattocks | 32 | Wife-H | — | Massachusetts |
| 5 | Mary Mattocks | 13 | Daughter | — | Massachusetts |
| 6 | William J. Jr. Mattocks | 12 | Son | — | Massachusetts |
| 7 | Alberta Mattocks | 8 | Daughter | — | Massachusetts |
| 8 | Francis Mattocks | 7 | Son | — | Massachusetts |
| 9 | Margaret Mattocks | 5 | Daughter | — | Massachusetts |
| 10 | Charles Mattocks | 3 | Son | — | Massachusetts |
| 11 | William R. Wills | 40 | Head | Operator | Maine |
| 12 | Rose Wills | 30 | Wife-H | — | Massachusetts |
| 13 | Isabelle Wills | 15 | Daughter | — | Massachusetts |
| 14 | Myrtle F. Wills | 13 | Daughter | — | Massachusetts |
| 15 | Rayfield W. Wills | 11 | Son | — | Massachusetts |
| 16 | Doris K. Wills | 9 | Daughter | — | Massachusetts |
| 17 | Robert F. Wills | 7 | Son | — | Massachusetts |
| 18 | Arthur S. Wills | 4 | Son | — | Massachusetts |
| 19 | John J. Mann | 31 | Head | Helper | Vermont |
| 20 | Margaret Mann | 29 | Wife-H | — | Massachusetts |
| 21 | John Jr. Mann THIS PERSON | 7 | Son | — | Massachusetts |
| 22 | Robert E. Mann | 5 | Son | — | Massachusetts |
| 23 | George Mann | 4 | Son | — | Massachusetts |
| 24 | Margaret J. Mann | 3 | Daughter | — | Massachusetts |
| 25 | Frances L. Mann | 1 | Daughter | — | Massachusetts |
| 26 | James Mann | 0 | Son | — | Massachusetts |
| 27 | Clarence P. Mann | 19 | Brother | Asst Shipper | Vermont |
| 28 | Harold Danforth | 33 | Head | Traffic Conductor | United States |
| 29 | Margaret Danforth | 26 | Wife-H | — | Massachusetts |
| 30 | George Danforth | 8 | Son | — | New York |
| 31 | Edward Danforth | 6 | Son | — | Massachusetts |
| 32 | William Danforth | 4 | Son | — | Massachusetts |
| 33 | Robert Danforth | 2 | Son | — | Massachusetts |
| 34 | Harold Jr. Danforth | 0 | Son | — | Massachusetts |
| 35 | Louis Danelli | 55 | Head | Retired | Italy |
| 36 | Maria Danelli | 46 | Wife-H | — | Italy |
| 37 | Joseph Danelli | 26 | Son | Mechanic | New York |
| 38 | Josephine Danelli | 21 | Daughter | Operator | New Hampshire |
| 39 | Adeline Danelli | 20 | Daughter | Operator | Massachusetts |
| 40 | Frank Danelli | 11 | Son | — | Massachusetts |
| 41 | Frank Macmahon | 41 | Head | Merchant | Massachusetts |
| 42 | Ethel Macmahon | 40 | Wife-H | — | Massachusetts |
| 43 | Harold Macmahon | 15 | Son | — | Massachusetts |
| 44 | Charles Macmahon | 13 | Son | — | Massachusetts |
| 45 | Ethel Macmahon | 11 | Daughter | — | Massachusetts |
| 46 | Edwin Macmahon | 7 | Son | — | Massachusetts |
| 47 | Mary J. O'Donnell | 35 | Head | Machinist | Massachusetts |
| 48 | Mary O'Donnell | 34 | Wife-H | — | Canada-French |
| 49 | John J. O'Donnell | 3 | Son | — | Massachusetts |
| 50 | Helen O'Donnell | 1 | Daughter | — | 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)