MC
Mary Cahill — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Mary Cahill across the 1900, 1910 and 1920 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1855), then head of a 6-person household.
Age 65
b. ~1855
Female
Head
Born: Ireland
Widowed
1920 Census Record Details
| Census Year | 1920 |
| Location | Middlesex, Massachusetts |
| Surname | Cahill |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1880 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1855 |
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.
6 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| James Cahill | Son | — | 23 | ~1897 |
| Mary Cahill | Daughter | — | 30 | ~1890 |
| Robert Cahill | Son | — | 35 | ~1885 |
| Mary Cahill | Head | — | 65 | ~1855 |
| Alice Cahill | Daughter | — | 25 | ~1895 |
| John Cahill | Son | — | 32 | ~1888 |
Census Appearances
1900
Middlesex, Massachusetts
Spouse, age 42
Middlesex, Massachusetts · implied b. ~1858 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cahill |
| Given Name | Mary J. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Ireland |
| Birth Month | Sept |
| Birth Year | 1858 |
| Year of Immigration | 1881 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Middlesex, Massachusetts
Spouse, age 57
Middlesex, Massachusetts · implied b. ~1853 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cahill |
| Given Name | Mary J |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 40 |
| Children Born | 4 |
| Children Living | 3 |
| Year of Immigration | 1880 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Middlesex, Massachusetts
Head, age 65
Middlesex, Massachusetts · implied b. ~1855 — 6 household members
| Surname | Cahill |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1880 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Cahill across 3 US Census years (1900, 1910 and 1920) in Middlesex, Massachusetts, using XGBoost record linkage.
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This person
Anchor record
Mary Cahill
Head · 1920 · age 65 · b. ~1855 · Massachusetts
★ You are viewing this record
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:1920:14thcensusofpopu718unit:1128)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Winifred G. Pike | 5 | Daughter | — | Massachusetts |
| 52 | Ryan H. Pike | 1 | Son | — | Massachusetts |
| 53 | John Lynch | 50 | Head | — | Ireland |
| 54 | Josephine B. Lynch | 50 | Wife | — | Ireland |
| 55 | Ada Delaney | 40 | Head | Booker | Canada |
| 56 | Edith Delaney | 22 | Daughter | Saleswoman | Canada |
| 57 | Cornelius P. Hanlon | 50 | Head | Mason | Ireland |
| 58 | Emma F. Hanlon | 53 | Wife | — | Ireland |
| 59 | Angeline F. Hanlon | 25 | Daughter | Clerk | Massachusetts |
| 60 | Richard F. Hanlon | 19 | Son | Salesman | Massachusetts |
| 61 | Arthur G. Hanlon | 18 | Son | Collector | Massachusetts |
| 62 | Oscar L. Bird | 24 | Head | Tile Maker | Massachusetts |
| 63 | Marion A. Bird | 21 | Wife | — | Massachusetts |
| 64 | Marion L. Bird | 2 | Daughter | — | Massachusetts |
| 65 | Anton F. May | 48 | Head | Upholsterer | Germany |
| 66 | Lena J. May | 42 | Wife | — | Germany |
| 67 | Edward A. May | 20 | Son | Electrician | Massachusetts |
| 68 | Lena J. May | 18 | Daughter | Typewriter | Massachusetts |
| 69 | Albert H. May | 13 | Son | — | Massachusetts |
| 70 | Francis W. May | 5 | Son | — | Massachusetts |
| 71 | James W. Lee | 47 | Head | Finisher | Pennsylvania |
| 72 | Minnie B. Lee | 45 | Wife | — | England |
| 73 | Edith H. Lee | 12 | Daughter | — | Massachusetts |
| 74 | Warren F. Berry | 60 | Head | Painter | New Hampshire |
| 75 | Annie G. Berry | 53 | Wife | — | Canada |
| 76 | Raymond F. Mclee | 30 | Head | Shipper | Massachusetts |
| 77 | Margaret L. Mclee | 28 | Wife | — | Massachusetts |
| 78 | Herbert B. Mclee | 5 | Son | — | Massachusetts |
| 79 | Ruth M. Mclee | 3 | Daughter | — | Massachusetts |
| 80 | Ernest A. Powers | 35 | Head | Electrician | Vermont |
| 81 | Mary Powers | 37 | Wife | Bookkeeper | Massachusetts |
| 82 | Ernest M. Powers | 10 | Son | — | Vermont |
| 83 | Alfred H. Hill | 50 | Head | Printer | Massachusetts |
| 84 | Lottie M. Hill | 46 | Wife | — | Massachusetts |
| 85 | Walter H. Hill | 14 | Son | — | Massachusetts |
| 86 | Dorothy M. Hill | 12 | Daughter | — | Massachusetts |
| 87 | Ruth H. Hill | 5 | Daughter | — | Massachusetts |
| 88 | Frank Black | 42 | Head | Proprietor | Maine |
| 89 | Bertha Black | 28 | Wife | — | Virginia |
| 90 | Mary E. Edward | 37 | Head | — | Ireland |
| 91 | Richard Edward | 11 | Son | — | Massachusetts |
| 92 | Alice Edward | 5 | Daughter | — | Massachusetts |
| 93 | Mary E. Cahill THIS PERSON | 65 | Head | — | Ireland |
| 94 | Robert G. Cahill | 35 | Son | Soap Maker | Massachusetts |
| 95 | John J. Cahill | 32 | Son | Foreman | Massachusetts |
| 96 | Mary G. Cahill | 30 | Daughter | Specialist | Massachusetts |
| 97 | Alice M. Cahill | 25 | Daughter | — | Massachusetts |
| 98 | James M. Cahill | 23 | Son | Salesman | Massachusetts |
| 99 | Harry Sterling | 34 | Head | Machinist | Scotland |
| 100 | Agnes S. Sterling | 25 | Wife | — | Scotland |
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)