JL
John Larkin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this John Larkin across the 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 12-person household.
Age 11
b. ~1929
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Larkin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Arbutus |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Arbutus |
| Est. Birth Year | ~1929 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Larkin | Daughter | — | 10 | ~1930 |
| Helen Larkin | Daughter | — | 6 | ~1934 |
| Frances Larkin | Daughter | — | 2 | ~1938 |
| Eleanor Larkin | Daughter | — | 14 | ~1926 |
| William Larkin | Head | — | 50 | ~1890 |
| Roland Larkin | Son | — | 27 | ~1913 |
| John Larkin | Son | — | 11 | ~1929 |
| William Larkin | Son | — | 19 | ~1921 |
| Thomas Larkin | Son | — | 15 | ~1925 |
| James Larkin | Son | — | 17 | ~1923 |
| Robert Larkin | Son | — | 15 | ~1925 |
| Hester Larkin | Spouse | — | 48 | ~1892 |
Census Appearances
1930
Baltimore, Maryland
Son, age
Baltimore, Maryland · implied b. ~1930 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larkins |
| Given Name | John R Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Son, age 11
Baltimore-County, Maryland · implied b. ~1929 — 12 household members
| Surname | Larkin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Arbutus |
| 1935 Residence (County) | Baltimore |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 John Larkin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Larkin
Son · 1940 · age 11 · b. ~1929 · Maryland
★ You are viewing this record
Sibling
Dorothy Larkin
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roland Larkin
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Larkin
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Larkin
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Larkin
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Larkin
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Larkin
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Larkin
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Larkin
Sibling · 1940 · age 15
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 — Baltimore-County, Maryland
Open full size
1940 US Federal Census — Baltimore-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01506-00478)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charlotte Case | 37 | Wife | — | Maryland |
| 2 | Otto Henning | 39 | Head | No | Maryland |
| 3 | Grace Henning | 38 | Wife | No | Maryland |
| 4 | Anita Henning | 17 | Daughter | Hairdresser | Maryland |
| 5 | Herbert Henning | 12 | Son | — | Maryland |
| 6 | Gloria Henning | 8 | Daughter | — | Maryland |
| 7 | Albert May | 81 | Father-in-law | No | Louisiana |
| 8 | Matilda May | 67 | Mother-in-law | No | Maryland |
| 9 | Karl Miller | 30 | Head | Cabinet Maker | Maryland |
| 10 | Hazel Miller | 23 | Wife | No | Maryland |
| 11 | Karl Jr. Miller | 3 | Son | — | Maryland |
| 12 | Broder Frederick | 28 | Head | Shipping Clerk | Maryland |
| 13 | Patrick Sullivan | 36 | Head | Guard | Maryland |
| 14 | Helen Sullivan | 28 | Wife | — | Maryland |
| 15 | William Larkin | 50 | Head | Erector | Maryland |
| 16 | Hester Larkin | 48 | Wife | — | Wash. D.C. |
| 17 | Roland Larkin | 27 | Son | Soda Dispenser | Maryland |
| 18 | William Larkin | 19 | Son | New Worker | Maryland |
| 19 | James Larkin | 17 | Son | — | Maryland |
| 20 | Robert Larkin | 15 | Son | — | Maryland |
| 21 | Thomas Larkin | 15 | Son | — | Maryland |
| 22 | Eleanor Larkin | 14 | Daughter | — | Maryland |
| 23 | John Larkin THIS PERSON | 11 | Son | — | Maryland |
| 24 | Dorothy Larkin | 10 | Daughter | — | Maryland |
| 25 | Frances Larkin | 2 | Daughter | — | Maryland |
| 26 | Helen Larkin | 6 | Daughter | — | Maryland |
| 27 | Edgar Parr | 47 | Head | Fireman | Maryland |
| 28 | Grace Parr | 46 | Wife | — | Maryland |
| 29 | William Parr | 19 | Son | Laborer | Maryland |
| 30 | William Sedicium | 23 | Brother-in-law | Laundry Fireman | Maryland |
| 31 | Priscilla Sedicium | 67 | Mother-in-law | — | Maryland |
| 32 | William Kaehler | 39 | Head | Paperhanger | Maryland |
| 33 | Marie Kaehler | 32 | Wife | — | Maryland |
| 34 | William Jr. Kaehler | 3 | Son | — | Maryland |
| 35 | Fletcher Fishbeck | 29 | Head | Office Clerk | Maryland |
| 36 | Rheda Fishbeck | 24 | Wife | — | Maryland |
| 37 | Gretchen Fishbeck | 3 | Daughter | — | Maryland |
| 38 | Calvin Hergen | 32 | Head | Mouldmaker | Maryland |
| 39 | Agnes Hergen | 30 | Wife | — | Maryland |
| 40 | Henry Whitney | 50 | Head | Foreman | Maryland |
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)