RJ
Robert Jennings — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Robert Jennings across the 1910, 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Michael & Michael — first a head (b.~1901), then head of a 3-person household.
Age 39
b. ~1901
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Jennings |
| Given Name | Robert H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Electrical Insp. |
| Industry | Edison |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2000 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Electrical Insp. |
| Township / Ward | Medford City |
| Est. Birth Year | ~1901 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Jennings | Son | — | 2 | ~1938 |
| Mary Jennings | Spouse | — | 29 | ~1911 |
| Robert Jennings | Head | — | 39 | ~1901 |
Census Appearances
1910
Middlesex, Massachusetts
Son, age 9
Middlesex, Massachusetts · implied b. ~1901 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jennings |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Son, age 19
Middlesex, Massachusetts · implied b. ~1901 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jennings |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Electrician |
| Industry | Electric Light |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 29
Middlesex, Massachusetts · implied b. ~1901 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jennings |
| Given Name | Robert A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Northern Ireland |
| Occupation | inspector |
| Industry | electric company |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 39
Middlesex-County, Massachusetts · implied b. ~1901 — 3 household members
| Surname | Jennings |
| Given Name | Robert H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Occupation | Electrical Insp. |
| Industry | Edison |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2000 |
| Highest Grade | H-4 |
| 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 Robert Jennings across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Michael Jennings (~0.92 confidence) and father Michael Jennings (~0.92 confidence) and mother Alice Jennings (~0.92 confidence) and mother Alice Jennings (~0.92 confidence) and mother Alice Jennings (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Michael Jennings
b. ~1870
Source father
● Household
· direct · ~0.92
Father
Michael Jennings
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Alice Jennings
b. ~1872
Source mother
● Household
· direct · ~0.92
Mother
Alice Jennings
b. ~1871
Source mother
● Household
· direct · ~0.92
Mother
Alice Jennings
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Jennings
Head · 1940 · age 39 · b. ~1901 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01612-00673)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mildred S Leahy | 14 | Daughter | — | Massachusetts |
| 42 | Lucille Leahy | 12 | Daughter | — | Massachusetts |
| 43 | Edward Leahy | 10 | Son | — | Massachusetts |
| 44 | Edward Dwyer | 45 | Head | Salesman | Massachusetts |
| 45 | Cecilia V Dwyer | 41 | Wife | — | Massachusetts |
| 46 | Helen Dwyer | 16 | Daughter | — | Massachusetts |
| 47 | Percy F Wolfe | 54 | Head | Civil Engineer | Massachusetts |
| 48 | Louise C Wolfe | 55 | Daughter | — | Maryland |
| 49 | Beatrice Wolfe | 23 | Daughter | Electrician | Massachusetts |
| 50 | Edmund Loranger | 59 | Head | Meat Cutter | Massachusetts |
| 51 | Ida M Loranger | 58 | Wife | — | Massachusetts |
| 52 | Ida B Loranger | 34 | Daughter | Clerk | Massachusetts |
| 53 | Jeannette C Loranger | 30 | Daughter | Teacher | Massachusetts |
| 54 | Harold J Carter | 49 | Head | Salesman | Massachusetts |
| 55 | Florence C Carter | 52 | Wife | — | Massachusetts |
| 56 | Harold J Jr Carter | 25 | Son | Clerk | Massachusetts |
| 57 | Robert B Carter | 23 | Son | Clerk | Massachusetts |
| 58 | Clifford C Carter | 15 | Son | — | Massachusetts |
| 59 | Herbert C Miller | 54 | Head | Chief Clerk | Canada-English |
| 60 | Elisha A Miller | 41 | Wife | — | New York |
| 61 | Gladys R Miller | 12 | Daughter | — | Massachusetts |
| 62 | Edith S Miller | 10 | Daughter | — | Massachusetts |
| 63 | Herbert C Jr Miller | 8 | Son | — | Massachusetts |
| 64 | George R Murray | 42 | Head | — | Massachusetts |
| 65 | Mary C Murray | 42 | Wife | — | Massachusetts |
| 66 | Barbara M Murray | 17 | Daughter | — | Massachusetts |
| 67 | George C Murray | 11 | Son | — | Massachusetts |
| 68 | Robert H Jennings THIS PERSON | 39 | Head | Electrical Insp. | Massachusetts |
| 69 | Mary L Jennings | 29 | Wife | — | Massachusetts |
| 70 | Robert H Jr Jennings | 2 | Son | — | Massachusetts |
| 71 | Grace Bower | 32 | Head | — | Massachusetts |
| 72 | Joyce A Bower | 8 | Daughter | — | Connecticut |
| 73 | Joseph F Bower | 2 | Son | — | Massachusetts |
| 74 | Harry R Peckham | 50 | Head | Machinist | Canada-English |
| 75 | Wilhelmina Peckham | 40 | Wife | — | Canada-English |
| 76 | Marjorie Peckham | 14 | Daughter | — | Massachusetts |
| 77 | Joan M Peckham | 9 | Daughter | — | Massachusetts |
| 78 | Robert J Peckham | 3 | Son | — | New Hampshire |
| 79 | Thomas P Coppinger | 59 | Head | Wholesale Grocer | Massachusetts |
| 80 | Mary A Coppinger | 55 | Wife | — | Massachusetts |
Pedigree Summary
Robert
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)