MS
Mary Shields — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Mary Shields across the 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 29-person household.
Age 10
b. ~1920
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Shields |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lowell City |
| Est. Birth Year | ~1920 |
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.
29 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Leo Shields | Son | — | 13 | ~1917 |
| Mary Shields | Spouse | — | 40 | ~1890 |
| Julia Shields | Other | — | 25 | ~1905 |
| Frank Shields | Son | — | 8 | ~1922 |
| Claire Shields | Daughter | — | 1 | ~1929 |
| Theresa Shields | Other | — | 23 | ~1907 |
| Mary Shields | Daughter | — | 10 | ~1920 |
| Frank Shields | Son | — | 41 | ~1889 |
| Mary Shields | Other | — | 27 | ~1903 |
| James Shields | Son | — | 5 | ~1925 |
| John Shields | Other | — | 38 | ~1892 |
| Patrick Shields | Head | — | 51 | ~1879 |
| Paul Shields | Son | — | 3 | ~1927 |
| Cecilia Shields | Daughter | — | 1 | ~1929 |
| Rita Shields | Daughter | — | 1 | ~1929 |
| John Shields | Son | — | 7 | ~1923 |
| William Shields | Other | — | 31 | ~1899 |
| Robert Shields | Son | — | ~1930 | |
| John Shields | Son | — | 21 | ~1909 |
| James Shields | Son | — | 19 | ~1911 |
| Robert Shields | Son | — | 9 | ~1921 |
| William Shields | Son | — | 2 | ~1928 |
| Richard Shields | Son | — | 5 | ~1925 |
| Edward Shields | Son | — | 7 | ~1923 |
| Mary Shields | Daughter | — | 17 | ~1913 |
| Elizabeth Shields | Daughter | — | 24 | ~1906 |
| William Shields | Son | — | 15 | ~1915 |
| Francis Shields | Son | — | 11 | ~1919 |
| Elizabeth Shields | Spouse | — | 51 | ~1879 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age
Middlesex, Massachusetts · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shields |
| Given Name | Mary R |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| 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 10
Middlesex, Massachusetts · implied b. ~1920 — 29 household members
| Surname | Shields |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| 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 |
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 Shields across 2 US Census years (1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Shields
Daughter · 1930 · age 10 · b. ~1920 · Massachusetts
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Sibling
William Shields
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Shields
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Shields
Sibling · 1930 · age 41
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Shields
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Shields
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Shields
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Shields
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Shields
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Shields
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Claire Shields
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Shields
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Shields
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Shields
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Shields
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Shields
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Shields
Sibling · 1930 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leo Shields
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Shields
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cecilia Shields
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Shields
Sibling · 1930 · age
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
1930 US Federal Census — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel921:0973)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Wood | 64 | Head | Engineer | England |
| 2 | Emma Wood | 61 | Wife | — | England |
| 3 | Leonard Wood | 31 | Son | Merchant | England |
| 4 | Annie E Leavitt | 73 | Head | — | New Hampshire |
| 5 | Ernest S Leavitt | 54 | Son | President | Massachusetts |
| 6 | Alice Leavitt | 53 | Daughter | Teacher | Massachusetts |
| 7 | Margaret Kerr | 23 | Maid | Maid | Ireland North |
| 8 | Mary Logan | 22 | Maid | Maid | Ireland North |
| 9 | Arthur S Wheeler | 67 | Head | — | Massachusetts |
| 10 | Delia Wheeler | 57 | Wife | — | Ireland Free State |
| 11 | Walter Wheeler | 41 | Chauffeur | Chauffeur | Canada French |
| 12 | William Maitland | 48 | Head | Cashier | Massachusetts |
| 13 | Mary Maitland | 47 | Wife | — | Massachusetts |
| 14 | Harriette Maitland | 24 | Daughter | — | Massachusetts |
| 15 | Florence Maitland | 22 | Daughter | — | Massachusetts |
| 16 | Bernadette Maitland | 19 | Daughter | Student | New Hampshire |
| 17 | William Maitland | 11 | Son | Student | Massachusetts |
| 18 | John Maitland | 8 | Son | — | Massachusetts |
| 19 | James Maitland | 4 | Son | — | Massachusetts |
| 20 | Ella Maitland | 27 | Daughter | — | Canada English |
| 21 | Arthur Maitland | 2 | Son | — | Massachusetts |
| 22 | Patrick Shields | 51 | Head | Salesman | Massachusetts |
| 23 | Elizabeth Shields | 51 | Wife | — | Massachusetts |
| 24 | Elizabeth Shields | 24 | Daughter | — | Massachusetts |
| 25 | John Shields | 21 | Son | — | Massachusetts |
| 26 | James Shields | 19 | Son | — | Massachusetts |
| 27 | Mary Shields | 17 | Daughter | — | Massachusetts |
| 28 | William Shields | 15 | Son | — | Massachusetts |
| 29 | Leo Shields | 13 | Son | — | Massachusetts |
| 30 | Francis Shields | 11 | Son | — | Massachusetts |
| 31 | Robert Shields | 9 | Son | — | Massachusetts |
| 32 | Edward Shields | 7 | Son | — | Massachusetts |
| 33 | Richard Shields | 5 | Son | — | Massachusetts |
| 34 | Paul Shields | 3 | Son | — | Massachusetts |
| 35 | Claire Shields | 1 | Daughter | — | Massachusetts |
| 36 | Rita Shields | 1 | Daughter | — | Massachusetts |
| 37 | Cecilia Shields | 1 | Daughter | — | Massachusetts |
| 38 | Frank Shields | 41 | Son | — | Massachusetts |
| 39 | Mary Shields | 40 | Wife | — | Massachusetts |
| 40 | Mary Shields THIS PERSON | 10 | Daughter | — | Massachusetts |
| 41 | Frank Shields | 8 | Son | — | Massachusetts |
| 42 | John Shields | 7 | Son | — | Massachusetts |
| 43 | James Shields | 5 | Son | — | Massachusetts |
| 44 | William Shields | 2 | Son | — | Massachusetts |
| 45 | Robert Shields | 0 | Son | — | Massachusetts |
| 46 | John Shields | 38 | Brother | — | Massachusetts |
| 47 | William Shields | 31 | Brother | — | Massachusetts |
| 48 | Mary Shields | 27 | Sister | — | Massachusetts |
| 49 | Julia Shields | 25 | Sister | — | Massachusetts |
| 50 | Theresa Shields | 23 | Sister | — | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)