JB
John Barr — 1920 US Census Record
Model Tree available1920 United States Federal Census · Washington, Maryland
Our Model Tree links this John Barr across the 1920, 1930 and 1940 US Censuses in Washington, Maryland (XGBoost, ~Confirmed), with identified parents Adam & Adam — first a son (b.~1909), then head of a 9-person household.
Age 11
b. ~1909
Male
Son
Born: Maryland
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Washington, Maryland |
| Surname | Barr |
| Given Name | John M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Virginia |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Election District No 21 Part Of |
| Est. Birth Year | ~1909 |
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.
9 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Jacob Metz | Other | — | 93 | ~1827 |
| Hannah Barr | Daughter | — | 14 | ~1906 |
| Martha Barr | Daughter | — | 19 | ~1901 |
| Adam Barr | Son | — | 9 | ~1911 |
| Jacob Barr | Son | — | 13 | ~1907 |
| John Barr | Son | — | 11 | ~1909 |
| Bertie Barr | Spouse | — | 48 | ~1872 |
| Anna Barr | Daughter | — | 7 | ~1913 |
| Berta Barr | Daughter | — | 5 | ~1915 |
Census Appearances
1920
Washington, Maryland
Son, age 11
Washington, Maryland · implied b. ~1909 — 9 household members
| Surname | Barr |
| Given Name | John M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Virginia |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Washington, Maryland
Son, age 21
Washington, Maryland · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bair |
| Given Name | John M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Virginia |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Washington-County, Maryland
Son, age 31
Washington-County, Maryland · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Baer |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Separated |
| Birthplace | Maryland |
| 1935 Residence (City) | HAGERSTOWN |
| 1935 Residence (County) | WASHINGTON |
| Occupation | Produce Distributor |
| Industry | Trucking |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 1500 |
| Highest Grade | No 10 |
| 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 Barr across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Adam Bair (~0.92 confidence) and father Adam Baer (~0.92 confidence) and mother Bertie Barr (~0.92 confidence) and mother Bertie Baer (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Adam Bair
b. ~1866
Source father
● Household
· direct · ~0.92
Father
Adam Baer
b. ~1865
Source father
● Household
· direct · ~0.92
Mother
Bertie Barr
b. ~1872
Source mother
● Household
· direct · ~0.92
Mother
Bertie Baer
b. ~1871
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Barr
Son · 1920 · age 11 · b. ~1909 · Maryland
★ You are viewing this record
Sibling
Anna Barr
Sibling · 1920 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Barr
Sibling · 1920 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Adam Barr
Sibling · 1920 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Berta Barr
Sibling · 1920 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hannah Barr
Sibling · 1920 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jacob Barr
Sibling · 1920 · age 13
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
1920 US Federal Census — Washington, Maryland
Open full size
1920 US Federal Census — Washington, Maryland
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu676unit:0659)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Bertie S Barr | 48 | Wife | — | Virginia |
| 52 | Martha S Barr | 19 | Daughter | — | Maryland |
| 53 | Hannah E Barr | 14 | Daughter | — | Maryland |
| 54 | Jacob E Barr | 13 | Son | — | Maryland |
| 55 | John M Barr THIS PERSON | 11 | Son | — | Maryland |
| 56 | Adam D Barr | 9 | Son | — | Maryland |
| 57 | Anna C Barr | 7 | Daughter | — | Virginia |
| 58 | Berta S Barr | 5 | Daughter | — | Maryland |
| 59 | Jacob Metz | 93 | Father-in-law | — | Pennsylvania |
| 60 | Caleb L Lansdale | 48 | Head | Farmer | Pennsylvania |
| 61 | Anna S Lansdale | 45 | Wife | — | Maryland |
| 62 | Lola M Smith | 24 | Daughter | — | Maryland |
| 63 | Cleo M Smith | 4 | Granddaughter | — | Maryland |
| 64 | Clayton Line | 40 | Boarder | Day Labor | Maryland |
| 65 | Cle H Martin | 33 | Head | Farmer | Pennsylvania |
| 66 | Susan Martin | 31 | Wife | — | Maryland |
| 67 | Hazel Martin | 4 | Daughter | — | Maryland |
| 68 | Alice Martin | 2 | Daughter | — | Maryland |
| 69 | Noah H Martin | 1 | Son | — | Maryland |
| 70 | Hattie H Martin | 22 | Sister | — | Maryland |
| 71 | John H Martin | 15 | Brother | Farm Laborer | Maryland |
| 72 | Harvey M Jr Barr | 33 | Head | Farmer | Maryland |
| 73 | Ella F Barr | 36 | Wife | — | Maryland |
| 74 | Norman H Barr | 9 | Son | — | Maryland |
| 75 | Solomon M Barr | 7 | Son | — | Maryland |
| 76 | Laura E Barr | 6 | Son | — | Maryland |
| 77 | Charles D Gearhart | 37 | Head | Farmer | Maryland |
| 78 | Ada S Gearhart | 37 | Wife | — | Maryland |
| 79 | William P Gearhart | 15 | Son | — | Maryland |
| 80 | Genevieve H Gearhart | 13 | Daughter | — | Maryland |
| 81 | Helen I Gearhart | 11 | Daughter | — | Maryland |
| 82 | Charles V Gearhart | 6 | Son | — | Maryland |
| 83 | Pansy M Gearhart | 0 | Daughter | — | Maryland |
| 84 | Joseph H Barkdoll | 63 | Head | Farmer | Maryland |
| 85 | Rachael A Barkdoll | 56 | Wife | — | Maryland |
| 86 | Rema M Barkdoll | 23 | Daughter | Seamstress | Maryland |
| 87 | Cornelius Myers | 63 | Head | Watchman | Pennsylvania |
| 88 | Sarah E Myers | 61 | Wife | — | Pennsylvania |
| 89 | William H Myers | 36 | Son | — | Pennsylvania |
| 90 | Clinton A Myers | 22 | Son | Section Hand | Maryland |
| 91 | Ida B Myers | 20 | Daughter-in-law | — | Maryland |
| 92 | Raymond E Myers | 1 | Grandson | — | Maryland |
| 93 | James P Mummert | 45 | Head | Section Hand | Pennsylvania |
| 94 | Hollie M Mummert | 41 | Wife | — | Maryland |
| 95 | Charlotte L Mummert | 10 | Daughter | — | Maryland |
| 96 | Isal Hemlin | 44 | Head | Farm Laborer | Pennsylvania |
| 97 | Susan S Hemlin | 38 | Wife | — | Maryland |
| 98 | Christian H Eshleman | 65 | Head | — | Maryland |
| 99 | Isaac M Barr | 27 | Head | Farmer | Maryland |
| 100 | Lizzie Nancy Barr | 28 | Half Sister | — | Maryland |
Pedigree Summary
John + 6 siblings
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 1920 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)