JL
John Leonard — 1930 US Census Record
Model Tree available1930 United States Federal Census · Dauphin, Pennsylvania
Our Model Tree links this John Leonard across the 1910, 1920 and 1930 US Censuses in Dauphin, Pennsylvania (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1903), then head of a 3-person household.
Age 27
b. ~1903
Male
Head
Born: Pennsylvania
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Dauphin, Pennsylvania |
| Surname | Leonard |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 24 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 5 |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Londonderry Township |
| Est. Birth Year | ~1903 |
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.
3 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Leonard | Head | — | 27 | ~1903 |
| Mary Leonard | Other | — | 24 | ~1906 |
| John Leonard | Son | — | 1 | ~1929 |
Census Appearances
1910
Dauphin, Pennsylvania
Son, age 9
Dauphin, Pennsylvania · implied b. ~1901 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Dauphin, Pennsylvania
Son, age 19
Dauphin, Pennsylvania · implied b. ~1901 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Dauphin, Pennsylvania
Head, age 27
Dauphin, Pennsylvania · implied b. ~1903 — 3 household members
| Surname | Leonard |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 24 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 5 |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Leonard across 3 US Census years (1910, 1920 and 1930) in Dauphin, Pennsylvania, using XGBoost record linkage. Identified parents: father John Leonard (~0.92 confidence) and father John Leonard (~0.92 confidence) and mother Emma Leonard (~0.92 confidence) and mother Emily Leonard (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Leonard
b. ~1874
Source father
● Household
· direct · ~0.92
Father
John Leonard
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Emma Leonard
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Emily Leonard
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Leonard
Head · 1930 · age 27 · b. ~1903 · Pennsylvania
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Dauphin, Pennsylvania
Open full size
1930 US Federal Census — Dauphin, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel2027:0795)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | William | 20 | son | — | Pennsylvania |
| 52 | Arthur Kohr | 51 | head | None | Pennsylvania |
| 53 | Mary Kohr | 54 | wife-H | — | Pennsylvania |
| 54 | Mary Kohr | 24 | daughter | — | Pennsylvania |
| 55 | Elizabeth Kohr | 22 | daughter | — | Pennsylvania |
| 56 | Lucy Kohr | 17 | daughter | — | Pennsylvania |
| 57 | Raymond Kohr | 15 | son | — | Pennsylvania |
| 58 | Ruth Kohr | 13 | daughter | — | Pennsylvania |
| 59 | Arthur Kohr | 11 | son | — | Pennsylvania |
| 60 | Arthur Schmuck | 26 | head | Laborer | Virginia |
| 61 | Myra Schmuck | 25 | wife-H | None | Virginia |
| 62 | Eugene Schmuck | 4 | son | — | Virginia |
| 63 | John Leonard | 57 | head | Farmer | Pennsylvania |
| 64 | Emma Leonard | 52 | wife-H | None | Pennsylvania |
| 65 | William Leonard | 16 | son | — | Pennsylvania |
| 66 | John Leonard THIS PERSON | 27 | head | — | Pennsylvania |
| 67 | Mary Leonard | 24 | wife-H | — | Pennsylvania |
| 68 | John Leonard | 1 | son | — | Pennsylvania |
| 69 | Russell Leonard | 23 | head | Laborer | Pennsylvania |
| 70 | Josephine Leonard | 17 | wife-H | None | Pennsylvania |
| 71 | Harold Leonard | 1 | son | — | Pennsylvania |
| 72 | Isaac Kohr | 41 | head | Laborer | Pennsylvania |
| 73 | Annie Kohr | 37 | wife-H | None | Pennsylvania |
| 74 | Mary Kohr | 13 | daughter | — | Pennsylvania |
| 75 | Helen Kohr | 11 | daughter | — | Pennsylvania |
| 76 | Ruth Kohr | 10 | daughter | — | Pennsylvania |
| 77 | Isaac Kohr | 8 | son | — | Pennsylvania |
| 78 | Charles Kohr | 6 | son | — | Pennsylvania |
| 79 | Edward Kohr | 4 | son | — | Pennsylvania |
| 80 | Lester Kohr | 1 | son | — | Pennsylvania |
| 81 | Harry Bauman | 52 | head | Carpenter | Pennsylvania |
| 82 | Mary Bauman | 51 | wife-H | None | Pennsylvania |
| 83 | Charles G. Minder | 43 | head | Fireman | Pennsylvania |
| 84 | Kathryn Minder | 41 | wife-H | None | Pennsylvania |
| 85 | Elsa V. Minder | 17 | daughter | Stenographer | Pennsylvania |
| 86 | Charles L. Minder | 14 | son | — | Pennsylvania |
| 87 | Arthur J. Minder | 8 | son | — | Pennsylvania |
| 88 | Ray Minder | 4 | son | — | Pennsylvania |
| 89 | Emma Minder | 71 | mother | None | Pennsylvania |
| 90 | Albert Bollmeyer | 48 | head | Laborer | Pennsylvania |
| 91 | Albert Jr. Bollmeyer | 4 | son | — | Pennsylvania |
| 92 | Olga Bair | 35 | servant | Housekeeper | Pennsylvania |
| 93 | William T. Hoff | 38 | head | Farmer | Pennsylvania |
| 94 | Mary A. Hoff | 38 | wife-H | None | Pennsylvania |
| 95 | Margaret Hoff | 15 | daughter | — | Pennsylvania |
| 96 | Mary Hoff | 13 | daughter | — | Pennsylvania |
| 97 | John A. Hoff | 11 | son | — | Pennsylvania |
| 98 | Martin Deer | 36 | head | Laborer | Pennsylvania |
| 99 | Annie Deer | 34 | wife-H | Laborer | Pennsylvania |
| 100 | Deer | None | — | — | — |
Pedigree Summary
John
Gen 1 · 4 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)