ML
Margaret Lyons — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Margaret Lyons across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Thomas — first a spouse (b.~1913), then head of a 3-person household.
Age 27
b. ~1913
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Lyons |
| Given Name | Margaret D. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | H 2 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Medford City |
| Est. Birth Year | ~1913 |
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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| Carole Lyons | Daughter | — | 2 | ~1938 |
| Charles Lyons | Head | — | 35 | ~1905 |
| Margaret Lyons | Spouse | — | 27 | ~1913 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 6
Middlesex, Massachusetts · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lyons |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 16
Middlesex, Massachusetts · implied b. ~1914 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lyons |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Spouse, age 27
Middlesex-County, Massachusetts · implied b. ~1913 — 3 household members
| Surname | Lyons |
| Given Name | Margaret D. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Highest Grade | H 2 |
| 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 Margaret Lyons across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Lyons (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Lyons
b. ~1880
Source father
● Household
· direct · ~0.92
This person
Anchor record
Margaret Lyons
Spouse · 1940 · age 27 · b. ~1913 · 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-t0627-01612-00893)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ruth G. Seiffert | 21 | Daughter | — | Massachusetts |
| 42 | Donald A. Seiffert | 0 | Grand-son | — | Massachusetts |
| 43 | Leslie L. Videon | 33 | Head | Carpenter | Massachusetts |
| 44 | Dorothy L. Videon | 32 | Wife | — | Massachusetts |
| 45 | Dorothy L. Videon | 9 | Daughter | — | Massachusetts |
| 46 | Barbara A. Videon | 7 | Daughter | — | Massachusetts |
| 47 | Hazen B. Thurrell | 37 | Head | Automobile Mechanic | Maine |
| 48 | Celia R. Thurrell | 40 | Wife | — | Maine |
| 49 | Elaine E. Thurrell | 15 | Daughter | — | Massachusetts |
| 50 | James Mccolgan | 39 | Head | — | Northern Ireland |
| 51 | Grace Mccolgan | 40 | Wife | — | Northern Ireland |
| 52 | Marjorie Mccolgan | 12 | Daughter | — | Massachusetts |
| 53 | James E. Mccolgan | 10 | Son | — | Massachusetts |
| 54 | John W. Mccolgan | 7 | Son | — | Massachusetts |
| 55 | Katherine Mccolgan | 5 | Daughter | — | Massachusetts |
| 56 | Elwood T. Perins | Perino | 44 | Head | Civil Engineer | Massachusetts |
| 57 | Beatrice M. Perins | Perino | 39 | Wife | — | Massachusetts |
| 58 | George D. Perins | Perino | 16 | Son | — | Massachusetts |
| 59 | Elwood T. Perins | Perino | 13 | Son | — | Massachusetts |
| 60 | John R. Perins | Perino | 11 | Son | — | Massachusetts |
| 61 | L. Pratt Clifford | 27 | Head | Salesman | New York |
| 62 | Margaret R. Clifford | 23 | Wife | — | Massachusetts |
| 63 | Margaret D. Clifford | 2 | Daughter | — | Massachusetts |
| 64 | James A. Smith | 54 | Head | Laborer | Maine |
| 65 | Florence M. Smith | 57 | Wife | — | Maine |
| 66 | Kenneth J. Smith | 16 | Son | Messenger Boy | Massachusetts |
| 67 | Charles Lyons | 35 | Head | Porter | Massachusetts |
| 68 | Margaret D. Lyons THIS PERSON | 27 | Wife | — | Massachusetts |
| 69 | Carole Ann Lyons | 2 | Daughter | — | Massachusetts |
| 70 | Zygmunt Borsky | 28 | Head | Route Foreman | Russia |
| 71 | Yvonne B. Borsky | 28 | Wife | — | Canada French |
| 72 | Loraine Borsky | 7 | Daughter | — | Massachusetts |
| 73 | Frederick T. Graham | 35 | Head | Laborer | Massachusetts |
| 74 | Vivian V. Graham | 27 | Wife | Tennis Maker | New Hampshire |
| 75 | Frederick J. Graham | 11 | Son | — | Massachusetts |
| 76 | Elizabeth F. Graham | 8 | Daughter | — | Massachusetts |
| 77 | Leo J. Letendre | 40 | Head | Automobile Mechanic | New Hampshire |
| 78 | Lydia L. Letendre | 42 | Wife | — | New Hampshire |
| 79 | Leo J. Letendre | 14 | Son | — | Maine |
| 80 | Richard L. Letendre | 12 | Son | — | Maine |
Pedigree Summary
Margaret
Gen 1 · 1 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)