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William Kirby — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Suffolk-County, Massachusetts

Our Model Tree links this William Kirby across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 7-person household.

Age 14 b. ~1926 Male Son Born: Massachusetts Single

1940 Census Record Details

Census Year1940
LocationSuffolk-County, Massachusetts
SurnameKirby
Given NameWilliam
Relationship to HeadSon
SexM
Color / RaceWhite
Age14
Marital StatusSingle
BirthplaceMassachusetts
1935 Residence (City)Boston City
1935 Residence (County)Suffolk
Additional Details
Highest GradeNo 7
1935 ResidenceSame place
Birth StateMassachusetts
Birth CountryUnited States
Birthplace (normalized)massachusetts
Township / WardBoston City
Est. Birth Year~1926

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.

7 people recorded at the same address in the 1940 census.

Name Relation to head Relative to William Age Birth yr
Jean Kirby Daughter — 7 ~1933
Michael Kirby Son — 11 ~1929
William Kirby Head — 42 ~1898
Margaret Kirby Spouse — 36 ~1904
Margaret Kirby Daughter — 9 ~1931
William Kirby Son — 14 ~1926
Mary Kirby Daughter — 15 ~1925

Census Appearances

1930
Suffolk, Massachusetts
Son, age 4
Suffolk, Massachusetts · implied b. ~1926 — 5 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Kirby
Given Name William
Relationship to Head Son
Sex M
Color / Race White
Age 4
Marital Status Single
Birthplace Massachusetts
Father's Birthplace Massachusetts
Mother's Birthplace Massachusetts
Birth State Massachusetts
Birth Country United States
Birthplace (normalized) massachusetts
1940
Suffolk-County, Massachusetts
Son, age 14
Suffolk-County, Massachusetts · implied b. ~1926 — 7 household members
Surname Kirby
Given Name William
Relationship to Head Son
Sex M
Color / Race White
Age 14
Marital Status Single
Birthplace Massachusetts
1935 Residence (City) Boston City
1935 Residence (County) Suffolk
Highest Grade No 7
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.
Linked across censuses
Our Model Tree links William Kirby across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Kirby
Son · 1940 · age 14 · b. ~1926 · Massachusetts
★ You are viewing this record
Sibling
Jean Kirby
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Kirby
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Kirby
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Kirby
Sibling · 1940 · age 9
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

Page Contents

38 people indexed on this census page (nara:1940:m-t0627-01667-00662)

Line Name Age Relation Occupation Birthplace
2 Clyde Bowie 53 Head Laborer Massachusetts
3 Emma Bowie 50 Wife Janitress Massachusetts
4 Mary Mcdonald 56 In-law — New York
5 William Kirby 42 Head Iron Worker Massachusetts
6 Margaret Kirby 36 Wife — Massachusetts
7 Mary Kirby 15 Daughter — Massachusetts
8 William Kirby THIS PERSON 14 Son — Massachusetts
9 Michael Kirby 11 Son — Massachusetts
10 Margaret Kirby 9 Daughter — Massachusetts
11 Jean Kirby 7 Daughter — Massachusetts
12 John Hughes 40 Head Laborer Massachusetts
13 Mary Hughes 39 Wife — Massachusetts
14 Mary Hughes 15 Daughter — Massachusetts
15 Edward Hughes 14 Son — Massachusetts
16 John Hughes 10 Son — Massachusetts
17 Robert Hughes 8 Son — Massachusetts
18 William Hughes 6 Son — Massachusetts
19 Elizabeth Hall 50 Head Saleswoman Canada English
20 Winifred Kelly 50 Head Machine Operator Ireland
21 Catherine Kelly 25 Daughter Laborer Massachusetts
22 Francis Kelly 20 Son Laborer Massachusetts
23 James Kelly 18 Son — Massachusetts
24 Thomas Kelly 17 Son — Massachusetts
25 Catherine Romieu 20 Niece Sales Clerk Massachusetts
26 Helen Mead 70 Head — Canada English
27 Nellie Tobin 57 Head — Ireland
28 Son Joseph None M Road Construction Project —
30 Alice Hemmett 55 Head — Massachusetts
31 Mary Hemmett 31 Daughter — Massachusetts
32 Catherine Hemmett 29 Daughter — Massachusetts
33 William Hemmett 29 Head Bell Hop Massachusetts
34 Mildred Hemmett 26 Wife — Massachusetts
35 Alice Hemmett 8 Daughter — Massachusetts
36 Joan Hemmett 7 Daughter — Massachusetts
37 William Hemmett 5 Son — Massachusetts
38 Robert Hemmett 3 Son — Massachusetts
39 Annie Killian 63 Head — England
40 Frederick Killian 31 Son — Massachusetts

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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)

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