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James Mann — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this James Mann across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 11-person household.
Age 10
b. ~1930
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Mann |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston |
| Est. Birth Year | ~1930 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Robert Mann | Son | — | 15 | ~1925 |
| John Mann | Head | — | 40 | ~1900 |
| John Mann | Son | — | 17 | ~1923 |
| George Mann | Son | — | 14 | ~1926 |
| Helen Mann | Daughter | — | 3 | ~1937 |
| James Mann | Son | — | 10 | ~1930 |
| Frances Mann | Daughter | — | 12 | ~1928 |
| Margaret Mann | Spouse | — | 38 | ~1902 |
| Margaret Mann | Daughter | — | 13 | ~1927 |
| Virginia Mann | Daughter | — | 8 | ~1932 |
| Joan Mann | Daughter | — | 5 | ~1935 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age
Suffolk, Massachusetts · implied b. ~1930 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mann |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| 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 10
Suffolk-County, Massachusetts · implied b. ~1930 — 11 household members
| Surname | Mann |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Highest Grade | No 5 |
| 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 Mann across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Mann
Son · 1940 · age 10 · b. ~1930 · Massachusetts
★ You are viewing this record
Sibling
Joan Mann
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mann
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Mann
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Mann
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Mann
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mann
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Mann
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mann
Sibling · 1940 · age 17
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
1940 US Federal Census — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01665-00370)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Barbara Carter | 6 | Daughter | — | Massachusetts |
| 2 | Adams Martus | 45 | Head | Bartender | Lithuania |
| 3 | Agna Martus | 44 | Wife | Cleaner | Lithuania |
| 4 | Agnes Martus | 20 | Daughter | Shipper | Massachusetts |
| 5 | Adele Martus | 17 | Daughter | — | Massachusetts |
| 6 | Mary Panda | 55 | Head | Stockkeeper | New Hampshire |
| 7 | Vincent De Carlo | 56 | Head | Tailor | Italy |
| 8 | Nancy De Carlo | 49 | Wife | — | Italy |
| 9 | Santina De Carlo | 22 | Daughter | Stitcher | Massachusetts |
| 10 | Santina De Carlo | 18 | Daughter | Stitcher | Massachusetts |
| 11 | Salvatore De Carlo | 20 | Son | News Hawker | Massachusetts |
| 12 | Francis De Carlo | 13 | Son | — | Massachusetts |
| 13 | Thomas De Carlo | 14 | Son | — | Massachusetts |
| 14 | Thomas Mcgregor | 38 | Head | Pipe Fitting | Eire |
| 15 | Dorothy Mcgregor | 33 | Wife | — | Massachusetts |
| 16 | Grace Mcgregor | 13 | Daughter | — | Massachusetts |
| 17 | Helen Mcgregor | 11 | Daughter | — | Massachusetts |
| 18 | Agnes Mcgregor | 9 | Daughter | — | Massachusetts |
| 19 | Dorothy Mcgregor | 5 | Daughter | — | Massachusetts |
| 20 | Shirley Mcgregor | 4 | Daughter | — | Massachusetts |
| 21 | Thomas Mcgregor | 3 | Son | — | Massachusetts |
| 22 | Arthur Mcgregor | 1 | Son | — | Massachusetts |
| 23 | William Mcgregor | 5 | Son | — | Massachusetts |
| 24 | John Mann | 40 | Head | Cut Stiller | Massachusetts |
| 25 | Margaret Mann | 38 | Wife | — | Massachusetts |
| 26 | John Mann | 17 | Son | — | Massachusetts |
| 27 | Robert Mann | 15 | Son | — | Massachusetts |
| 28 | George Mann | 14 | Son | — | Massachusetts |
| 29 | Margaret Mann | 13 | Daughter | — | Massachusetts |
| 30 | Frances Mann | 12 | Daughter | — | Massachusetts |
| 31 | James Mann THIS PERSON | 10 | Son | — | Massachusetts |
| 32 | Virginia Mann | 8 | Daughter | — | Massachusetts |
| 33 | Joan Mann | 5 | Daughter | — | Massachusetts |
| 34 | Helen Mann | 3 | Daughter | — | Massachusetts |
| 35 | Dudley Cloberty | 49 | Head | Tool Handler | Eire |
| 36 | Mary Cloberty | 50 | Wife | — | Eire |
| 37 | Margaret Cloberty | 24 | Daughter | Coffee Shop | Massachusetts |
| 38 | Patrick Cloberty | 23 | Son | Laborer | Massachusetts |
| 39 | John Cloberty | 21 | Son | News Worker | Massachusetts |
| 40 | Michael Cloberty | 17 | Son | Laborer | Massachusetts |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)