MS
Mary Sullivan — 1920 US Census Record
Model Tree available1920 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Mary Sullivan across the 1920, 1930 and 1940 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed), with identified parents Philip & Philip — first a son (b.~1918), then head of a 4-person household.
Age 2
b. ~1918
Male
Son
Born: New Hampshire
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Middlesex, Massachusetts |
| Surname | Sullivan |
| Given Name | Mary R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Township / Ward | Pepperell Town |
| Est. Birth Year | ~1918 |
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.
4 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Philip Sullivan | Head | — | 41 | ~1879 |
| Mary Sullivan | Son | — | 2 | ~1918 |
| Philip Sullivan | Son | — | 4 | ~1916 |
| Florence Sullivan | Spouse | — | 30 | ~1890 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 2
Middlesex, Massachusetts · implied b. ~1918 — 4 household members
| Surname | Sullivan |
| Given Name | Mary R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Massachusetts |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1930
Middlesex, Massachusetts
Son, age 13
Middlesex, Massachusetts · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Mark R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1940
Suffolk-County, Massachusetts
Other, age 23
Suffolk-County, Massachusetts · implied b. ~1917 — 40 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Mark P |
| Relationship to Head | pupil |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| 1935 Residence (City) | East Pepperell |
| 1935 Residence (County) | Middlesex |
| Industry | S |
| Class of Worker | 0 |
| Highest Grade | C 5 |
| 1935 Residence | Massachusetts |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
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 Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Philip Sullivan (~0.92 confidence) and father Philip Sullivan (~0.92 confidence) and mother Philomena Sullivan (~0.92 confidence) and mother Florence Sullivan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Philip Sullivan
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Philip Sullivan
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Philomena Sullivan
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Florence Sullivan
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Sullivan
Son · 1920 · age 2 · b. ~1918 · Massachusetts
★ You are viewing this record
Sibling
Philip Sullivan
Sibling · 1920 · age 4
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
1920 US Federal Census — Middlesex, Massachusetts
Open full size
1920 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu717unit:0488)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Mary Martine | 1 | Daughter | — | Massachusetts |
| 52 | Joseph O. Janell | 65 | Head | Laborer | Canada |
| 53 | Magdelene Janell | 65 | Wife | — | Canada |
| 54 | Alvin G. Janell | 23 | Son-in-law | Trimmer | New Hampshire |
| 55 | Eva G. Janell | 31 | Daughter | — | Massachusetts |
| 56 | Herbert G. Ansell | 32 | Head | Foreman | England |
| 57 | Alice L. Ansell | 21 | Wife | Counter | Maine |
| 58 | Selah A. Goodwin | 34 | Sister-in-law | Counter | Maine |
| 59 | Earl M. Goodwin | 11 | Boarder | — | New York |
| 60 | Philip J. Sullivan | 41 | Head | Freight Handler | Ireland |
| 61 | Florence M. Sullivan | 30 | Wife | — | Massachusetts |
| 62 | Philip J. Jr. Sullivan | 4 | Son | — | New Hampshire |
| 63 | Mary R. Sullivan THIS PERSON | 2 | Son | — | New Hampshire |
| 64 | Thomas Clark | 50 | Head | Brakeman | Scotland |
| 65 | Mary B. Harriden | 45 | Housekeeper | Private Family | Canada |
| 66 | Walter M. Hassey | 16 | Boarder | Laborer | Massachusetts |
| 67 | Frank G. Hassey | 10 | Boarder | — | Massachusetts |
| 68 | Frederick J. Hassey | 7 | Boarder | — | Massachusetts |
| 69 | Agnes M. Hassey | 5 | Boarder | — | Massachusetts |
| 70 | Timothy Connolly | 53 | Head | Section Hand | Ireland |
| 71 | Alice E. Connolly | 47 | Wife | — | Massachusetts |
| 72 | Mary J. Connolly | 24 | Daughter | Redressing | Massachusetts |
| 73 | Alice G. Connolly | 22 | Daughter | Laborer | Massachusetts |
| 74 | Helen V. Connolly | 18 | Daughter | Boarder | Massachusetts |
| 75 | Madeline R. Connolly | 16 | Daughter | Boarder | Massachusetts |
| 76 | Agnes C. Connolly | 15 | Daughter | — | Massachusetts |
| 77 | Leo P. Connolly | 12 | Son | — | Massachusetts |
| 78 | Myron M. Blood | 68 | Head | Contractor | Massachusetts |
| 79 | Mary E. Blood | 68 | Wife | — | Massachusetts |
| 80 | Ray L. Adams | 44 | Head | Gardener | Massachusetts |
| 81 | Robert H. Faulkner | 33 | Head | Carpenter | Massachusetts |
| 82 | Catherine M. Faulkner | 28 | Wife | — | Massachusetts |
| 83 | Eleanor C. Faulkner | 0 | Daughter | — | Massachusetts |
| 84 | Robert M. Faulkner | 2 | Son | — | Massachusetts |
| 85 | Jeremiah Supple | 51 | Head | Section Hand | Ireland |
| 86 | Ellen Supple | 46 | Wife | — | Ireland |
| 87 | Uelian X. Supple | 18 | Son | Laborer | Massachusetts |
| 88 | Frances Supple | 15 | Daughter | — | Massachusetts |
| 89 | Catherine J. Supple | 13 | Daughter | — | Massachusetts |
| 90 | William J. Supple | 11 | Son | — | Massachusetts |
| 91 | Leo H. Supple | 5 | Son | — | Massachusetts |
| 92 | John P. Whalen | 55 | Head | Gate Tender | Massachusetts |
| 93 | Mary A. Whalen | 50 | Wife | — | Massachusetts |
| 94 | Joseph Mellen | 24 | Head | Apprentice | Rhode Island |
| 95 | Mary Mellen | 27 | Wife | — | Rhode Island |
| 96 | Joseph Mellen | 1 | Son | — | Massachusetts |
| 97 | Frank W. Ford | 34 | Head | Fireman | New Hampshire |
| 98 | Helen L. Ford | 25 | Wife | — | Massachusetts |
| 99 | Lenore E. Ford | 0 | Daughter | — | Massachusetts |
| 100 | Bert E. Blood | 42 | Head | Gate Tender | Massachusetts |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)