JL
John Long — 1930 US Census Record
Model Tree available1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this John Long across the 1920, 1930 and 1940 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1910), then head of a 9-person household.
Age 20
b. ~1910
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Long |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | Chauffeur |
| Industry | Transporting |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Chauffeur |
| Township / Ward | City Of Somerville |
| Est. Birth Year | ~1910 |
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 |
|---|---|---|---|---|
| Mildred Long | Daughter | — | 9 | ~1921 |
| Edith Long | Daughter | — | 18 | ~1912 |
| Grace Long | Daughter | — | 7 | ~1923 |
| Dorothy Long | Daughter | — | 2 | ~1928 |
| Gertrude Long | Daughter | — | 12 | ~1918 |
| John Long | Head | — | 54 | ~1876 |
| Clara Long | Other | — | 45 | ~1885 |
| John Long | Son | — | 20 | ~1910 |
| Joseph Long | Son | — | 14 | ~1916 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 10
Middlesex, Massachusetts · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Long |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 20
Middlesex, Massachusetts · implied b. ~1910 — 9 household members
| Surname | Long |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Chauffeur |
| Industry | Transporting |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 30
Middlesex-County, Massachusetts · implied b. ~1910 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Longi |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden City |
| 1935 Residence (County) | Middlesex |
| Occupation | Salesman |
| Industry | Printing |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 1400 |
| Highest Grade | Hs 3 |
| 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 John Long across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Long (~0.92 confidence) and father John Long (~0.92 confidence) and mother Florence Long (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Long
b. ~1876
Source father
● Household
· direct · ~0.92
Father
John Long
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Florence Long
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Long
Son · 1930 · age 20 · b. ~1910 · Massachusetts
★ You are viewing this record
Sibling
Mildred Long
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edith Long
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Long
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Long
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Long
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Long
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:massachusettscensus00reel927:0812)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Flossie B. Taylor | 34 | Wife-H | — | Maine |
| 52 | Luella H. Taylor | 9 | Daughter | — | Maine |
| 53 | Edward H. Taylor | 4 | Son | — | Maine |
| 54 | Harold M. Rivers | 20 | Boarder | Operator | Massachusetts |
| 55 | Augustus C. Walton | 50 | Head | Police Officer | Helgoland |
| 56 | Catherine A. Walton | 50 | Wife-H | — | Massachusetts |
| 57 | Gertrude Walton | 25 | Daughter | Retail Saleslady | Massachusetts |
| 58 | James W. Flanagan | 22 | Head | Pipefitter | Massachusetts |
| 59 | Margaret M. Flanagan | 54 | Wife-H | — | Delaware |
| 60 | Ruth E. Flanagan | 28 | Sister | Accountant | Massachusetts |
| 61 | Marguerite F. Flanagan | 26 | Sister | Bookkeeper | Maine |
| 62 | Catherine M. Flanagan | 21 | Sister | Billing Clerk | Massachusetts |
| 63 | John W. Flanagan | 18 | Brother | Retail Salesman | Massachusetts |
| 64 | Amelia F. Flanagan | 16 | Sister | — | Massachusetts |
| 65 | James S. Calhoun | 27 | Head | Laborer | Irish Free State |
| 66 | Mary A. Calhoun | 25 | Wife-H | — | Irish Free State |
| 67 | James S. Jr. Calhoun | 4 | Son | — | Massachusetts |
| 68 | Edith M. Calhoun | 2 | Daughter | — | Massachusetts |
| 69 | Horatio N. Pease | 53 | Head | Examiner | Massachusetts |
| 70 | Lottie M. Pease | 50 | Wife-H | — | Massachusetts |
| 71 | Kathryn M. Pease | 25 | Daughter | Teacher | Massachusetts |
| 72 | Horatio N. Jr. Pease | 21 | Son | Broker Clerk | Massachusetts |
| 73 | Louis Friedenberg | 38 | Head | Plumber | Pennsylvania |
| 74 | Rebecca H. Friedenberg | 37 | Wife-H | — | Pennsylvania |
| 75 | Hilda F. Friedenberg | 9 | Daughter | — | Massachusetts |
| 76 | Doris Friedenberg | 3 | Daughter | — | Massachusetts |
| 77 | Henry S. Wetmore | 57 | Head | Foreman | Nova Scotia |
| 78 | Ada M. Wetmore | 52 | Wife-H | — | Canada-English |
| 79 | Lillian M. Doucette | 16 | Step-child | — | Canada-English |
| 80 | Heloise M. Doucette | 6 | Step-child | — | Canada-English |
| 81 | Frank Bogle | 36 | Boarder | Laborer | Canada-English |
| 82 | Peter Macintosh | 42 | Boarder | Laborer | Canada-English |
| 83 | Lester R. Holland | 47 | Head | Salesman | Massachusetts |
| 84 | Catherine T. Holland | 46 | Wife-H | — | Irish Free State |
| 85 | Lester R. Jr. Holland | 17 | Son | Mailer | Massachusetts |
| 86 | Louise E. Holland | 16 | Daughter | — | Massachusetts |
| 87 | John N. Long | 54 | Head | Foreman | Massachusetts |
| 88 | Clara I. Long | 45 | Wife-H | — | Massachusetts |
| 89 | John H. Long THIS PERSON | 20 | Son | Chauffeur | Massachusetts |
| 90 | Edith Long | 18 | Daughter | General Worker | Massachusetts |
| 91 | Joseph Long | 14 | Son | — | Massachusetts |
| 92 | Gertrude Long | 12 | Daughter | — | Massachusetts |
| 93 | Mildred Long | 9 | Daughter | — | Massachusetts |
| 94 | Grace Long | 7 | Daughter | — | Massachusetts |
| 95 | Dorothy Long | 2 | Daughter | — | Massachusetts |
| 96 | Joseph V. Giroux | 57 | Head | Dealer | Canada-French |
| 97 | Edmund F. Giroux | 22 | Son | — | Massachusetts |
| 98 | Louise R. Giroux | 16 | Daughter | — | Massachusetts |
| 99 | John Beck | 66 | Head | Proprietor | Bavaria-Germany |
| 100 | John A. Beck | 33 | Son | Chauffeur | Massachusetts |
Pedigree Summary
John + 6 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)