MC
Mary Costello — 1930 US Census Record
Model Tree available1930 United States Federal Census · Essex, Massachusetts
Our Model Tree links this Mary Costello across the 1910, 1920 and 1930 US Censuses in Essex, Massachusetts (XGBoost, ~Confirmed), with identified parents Annie & Michael — first a daughter (b.~1908), then head of a 8-person household.
Age 22
b. ~1908
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Essex, Massachusetts |
| Surname | Costello |
| Given Name | Mary B. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New York |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | North Andover Town |
| Est. Birth Year | ~1908 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Margaret Costello | Daughter | — | 20 | ~1910 |
| Julia Costello | Daughter | — | 17 | ~1913 |
| Mary Costello | Daughter | — | 22 | ~1908 |
| Michael Costello | Head | — | 55 | ~1875 |
| William Costello | Son | — | 26 | ~1904 |
| John Costello | Son | — | 24 | ~1906 |
| Vincent Costello | Son | — | 14 | ~1916 |
| Annie Costello | Spouse | — | 53 | ~1877 |
Census Appearances
1910
Essex, Massachusetts
Daughter, age 2
Essex, Massachusetts · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costello |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New York |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Essex, Massachusetts
Daughter, age 11
Essex, Massachusetts · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costello |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New York |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Daughter, age 22
Essex, Massachusetts · implied b. ~1908 — 8 household members
| Surname | Costello |
| Given Name | Mary B. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New York |
| Occupation | none |
| 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 Costello across 3 US Census years (1910, 1920 and 1930) in Essex, Massachusetts, using XGBoost record linkage. Identified parents: mother Annie Costello (~0.92 confidence) and father Michael Costello (~0.92 confidence) and mother Annie Costello (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Annie Costello
b. ~1873
Source mother
● Household
· direct · ~0.92
Father
Michael Costello
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Annie Costello
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Costello
Daughter · 1930 · age 22 · b. ~1908 · Massachusetts
★ You are viewing this record
Sibling
Vincent Costello
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Costello
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julia Costello
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Costello
Sibling · 1930 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Costello
Sibling · 1930 · age 26
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 — Essex, Massachusetts
Open full size
1930 US Federal Census — Essex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel902:0067)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Jennie G. Keefe | 54 | Head | None | Massachusetts |
| 52 | Alice G. Keefe | 51 | Sister | Teacher | Massachusetts |
| 53 | Mary G. Keefe | 47 | Sister | Mender | Massachusetts |
| 54 | Helena G. Keefe | 42 | Sister | Teacher | Massachusetts |
| 55 | Raymond A. Towne | 39 | Head | Electrician | Massachusetts |
| 56 | Lillian B. Towne | 33 | Wife | None | Massachusetts |
| 57 | Raymond A. Jr. Towne | 11 | Son | None | Massachusetts |
| 58 | Allen W. Towne | 9 | Son | None | Massachusetts |
| 59 | Alphonso V. Smith | 31 | Head | Machinist | England |
| 60 | Lillian May Smith | 36 | Wife | None | Maine |
| 61 | Daniel J. Donovan | 53 | Head | Machinist | Massachusetts |
| 62 | Mary G. Donovan | 48 | Wife | None | England |
| 63 | Edward J. Donovan | 22 | Son | Mill Shipper | Massachusetts |
| 64 | Albert W. Dearborn | 30 | Head | Agent | Massachusetts |
| 65 | Alice C. Dearborn | 34 | Wife | None | Massachusetts |
| 66 | Edwin F. Koenig | 35 | Head | Tinsmith | Massachusetts |
| 67 | Elsie H. Koenig | 34 | Wife | None | Massachusetts |
| 68 | Evelyn S. Koenig | 8 | Daughter | None | Massachusetts |
| 69 | Charles Manning | 40 | Head | Chauffeur | Massachusetts |
| 70 | Sarah L. Manning | 43 | Wife | None | Nova Scotia |
| 71 | Margaret V. Manning | 10 | Daughter | None | Massachusetts |
| 72 | Frances M. Manning | 8 | Daughter | None | Massachusetts |
| 73 | Nellie F. Regan | 50 | Head | Cook | Massachusetts |
| 74 | Catherine Casey | 78 | Aunt | None | Irish Free State |
| 75 | John Mcallister | 39 | Lodger | Floor Tender | Massachusetts |
| 76 | Agnes E. Finn | 41 | Head | Mender | Rhode Island |
| 77 | Mary E. Finn | 39 | Sister | None | Rhode Island |
| 78 | William H. Finn | 33 | Brother | Weaver | Massachusetts |
| 79 | Margaret L. Finn | 32 | Sister | Mender | Massachusetts |
| 80 | Robert A. Mackie | 47 | Head | Weaver | Massachusetts |
| 81 | Annie M. Mackie | 42 | Wife | None | Massachusetts |
| 82 | Helen M. Mackie | 11 | Daughter | None | Massachusetts |
| 83 | Anna Mackie | 7 | Daughter | None | Massachusetts |
| 84 | William F. Mackie | 5 | Son | None | Massachusetts |
| 85 | George L. Kennedy | 55 | Head | Truckman | New Hampshire |
| 86 | Ida L. Kennedy | 42 | Wife | None | Nova Scotia |
| 87 | Edward L. Kennedy | 18 | Son | None | Massachusetts |
| 88 | George W. Kennedy | 16 | Son | Back Tender | Massachusetts |
| 89 | Albert G. Kennedy | 14 | Son | None | Massachusetts |
| 90 | Ida E. Kennedy | 12 | Daughter | None | Massachusetts |
| 91 | Esther M. Brownell | 9 | Lodger | None | Massachusetts |
| 92 | Michael M. Costello | 55 | Head | Mill Operative | Massachusetts |
| 93 | Annie G. Costello | 53 | Wife | None | New York |
| 94 | William M. Costello | 26 | Son | Operative | Massachusetts |
| 95 | John S. Costello | 24 | Son | Clerk | Massachusetts |
| 96 | Mary B. Costello THIS PERSON | 22 | Daughter | None | Massachusetts |
| 97 | Margaret M. Costello | 20 | Daughter | Assistant | Massachusetts |
| 98 | Julia E. Costello | 17 | Daughter | None | Massachusetts |
| 99 | Vincent M. Costello | 14 | Son | None | Massachusetts |
| 100 | Harold S. Sanborn | 36 | Head | Auto Body Finisher | Massachusetts |
Related Census Records
Pedigree Summary
Mary + 5 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)