MN
Mary Nolan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Nolan across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 9-person household.
Age 12
b. ~1928
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Nolan |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1928 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Nolan | Daughter | — | 12 | ~1928 |
| Helen Nolan | Daughter | — | 5 | ~1935 |
| Dorothy Nolan | Daughter | — | 1 | ~1939 |
| Betty Nolan | Daughter | — | 9 | ~1931 |
| Richard Nolan | Head | — | 33 | ~1907 |
| David Nolan | Son | — | 2 | ~1938 |
| Richard Nolan | Son | — | 7 | ~1933 |
| Gerald Nolan | Son | — | 4 | ~1936 |
| Helen Nolan | Spouse | — | 28 | ~1912 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 1
Suffolk, Massachusetts · implied b. ~1929 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nolan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 12
Suffolk-County, Massachusetts · implied b. ~1928 — 9 household members
| Surname | Nolan |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Highest Grade | No 6 |
| 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 Mary Nolan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Nolan
Daughter · 1940 · age 12 · b. ~1928 · Massachusetts
★ You are viewing this record
Sibling
Dorothy Nolan
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Nolan
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Nolan
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Nolan
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Nolan
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Nolan
Sibling · 1940 · age 7
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-t0627-01659-00563)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Gill | 60 | Lodger | Pipe Layer | Eire |
| 2 | Thomas Byrne | 67 | Lodger | Watchman | Eire |
| 3 | John Jamison | 35 | Lodger | Laborer | Massachusetts |
| 4 | Edward Farr | 60 | Lodger | Waiter | Massachusetts |
| 5 | George Horner | 66 | Head | Baker | Massachusetts |
| 6 | Charles Mcnamara | 68 | Lodger | Storekeeper | Massachusetts |
| 7 | Edward Dickinson | 62 | Lodger | — | Canada English |
| 8 | John Scanlon | 59 | Lodger | Freight Handler | Eire |
| 9 | Thomas Graves | 77 | Lodger | Teamster | Canada English |
| 10 | Maurice Cunningham | 55 | Lodger | Watchman | Eire |
| 11 | Daniel Kingston | 75 | Lodger | — | Eire |
| 12 | John Coady | 52 | Lodger | — | Eire |
| 13 | David O'Connell | 38 | Lodger | Freight Handler | Eire |
| 14 | Charles Raftell | 60 | Lodger | Fruit Store | Greece |
| 15 | George Forbes | 65 | Lodger | Cashier | New Jersey |
| 16 | Charles Mclaughlin | 64 | Lodger | Laborer | Eire |
| 17 | Fred Middleman | 63 | Head | Druggist | Canada English |
| 18 | Laura Middleman | 51 | Wife | Clerk | Canada English |
| 19 | Florence Young | 65 | Head | — | Kansas |
| 20 | Lottie Cushing | 73 | Head | Boxmaker | Massachusetts |
| 21 | Clifford Harvey | 46 | Head | Straightener | Canada English |
| 22 | Merle Harvey | 17 | Son | — | New Hampshire |
| 23 | Maxine Harvey | 16 | daughter | — | New Hampshire |
| 24 | Francis Harvey | 7 | son | — | Massachusetts |
| 25 | Laura Robertson | 68 | in law | — | Canada English |
| 26 | Richard Harris | 61 | Head | Helper | Eire |
| 27 | Catherine Harris | 65 | Wife | — | Eire |
| 28 | Richard Harris | 29 | Son | Cabinet Maker | Massachusetts |
| 29 | Richard Nolan | 33 | Head | Signal Repair | Massachusetts |
| 30 | Helen Nolan | 28 | Wife | Clerk | Massachusetts |
| 31 | Mary Nolan THIS PERSON | 12 | daughter | — | Massachusetts |
| 32 | Betty Nolan | 9 | daughter | — | Massachusetts |
| 33 | Richard Nolan | 7 | Son | — | Massachusetts |
| 34 | Helen Nolan | 5 | daughter | — | Massachusetts |
| 35 | Gerald Nolan | 4 | Son | — | Massachusetts |
| 36 | David Nolan | 2 | Son | — | Massachusetts |
| 37 | Dorothy Nolan | 1 | daughter | — | Massachusetts |
| 38 | Arthur Smith | 58 | Head | Watchman | Texas |
| 39 | Ruth Smith | 45 | Wife | — | Massachusetts |
| 40 | Sarah Devlin | 56 | Head | — | Ireland |
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)