WB
William Blair — 1920 US Census Record
Model Tree available1920 United States Federal Census · Charles, Maryland
Our Model Tree links this William Blair across the 1900, 1910 and 1920 US Censuses in Charles, Maryland (XGBoost, ~Confirmed), with identified parents Henry & William — first a son (b.~1900), then head of a 4-person household.
Age 20
b. ~1900
Male
Son
Born: Maryland
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Charles, Maryland |
| Surname | Blair |
| Given Name | William H. J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Mulatto |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | Laborer |
| Industry | Indian Head |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Laborer |
| Township / Ward | Part Of 7Th Dist |
| Est. Birth Year | ~1900 |
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.
4 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Viola Blair | Daughter | — | 22 | ~1898 |
| William Blair | Head | — | 66 | ~1854 |
| William Blair | Son | — | 20 | ~1900 |
| Alice Blair | Spouse | — | 62 | ~1858 |
Census Appearances
1900
Charles, Maryland
Son, age 1
Charles, Maryland · implied b. ~1899 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Maryland |
| Birth Year | 1899 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | No |
| Can Write | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1910
Charles, Maryland
Son, age 11
Charles, Maryland · implied b. ~1899 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1920
Charles, Maryland
Son, age 20
Charles, Maryland · implied b. ~1900 — 4 household members
| Surname | Blair |
| Given Name | William H. J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Mulatto |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Indian Head |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| 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 William Blair across 3 US Census years (1900, 1910 and 1920) in Charles, Maryland, using XGBoost record linkage. Identified parents: father Henry Blair (~0.92 confidence) and father William Blair (~0.92 confidence) and mother Alice Blair (~0.92 confidence) and father William Blair (~0.92 confidence) and mother Alice Blair (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Henry Blair
b. ~1853
Source father
● Household
· direct · ~0.92
Father
William Blair
b. ~1854
Source father
● Household
· direct · ~0.92
Mother
Alice Blair
b. ~1855
Source mother
● Household
· direct · ~0.92
Father
William Blair
b. ~1855
Source father
● Household
· direct · ~0.92
Mother
Alice Blair
b. ~1865
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Blair
Son · 1920 · age 20 · b. ~1900 · Maryland
★ You are viewing this record
Sibling
Viola Blair
Sibling · 1920 · age 22
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 — Charles, Maryland
Open full size
1920 US Federal Census — Charles, Maryland
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu671unit:0042)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James E. Bell | 32 | Head | Laborer | Maryland |
| 2 | James C. Bell | 6 | Son | — | Maryland |
| 3 | John L. Bell | 4 | Son | — | Maryland |
| 4 | Wilson Ford | 60 | Head | Laborer | Maryland |
| 5 | Millie Ford | 45 | Wife | — | Maryland |
| 6 | Catherine Ford | 15 | Daughter | — | Maryland |
| 7 | Leo Ford | 12 | Son | — | Maryland |
| 8 | Martha Ford | 10 | Daughter | — | Maryland |
| 9 | James Ford | 9 | Son | — | Maryland |
| 10 | Nellie Ford | 7 | Daughter | — | Maryland |
| 11 | Mary Ellen Ford | 6 | Daughter | — | Maryland |
| 12 | Margaret Ford | 2 | Daughter | — | Maryland |
| 13 | Harriet Hawkins | 80 | Head | — | Maryland |
| 14 | Anna Ford | 17 | Daughter | — | Maryland |
| 15 | Georgeana Butler | 23 | Head | — | Maryland |
| 16 | Clarence Butler | 2 | Son | — | Maryland |
| 17 | James Martin | 9 | Boarder | — | Maryland |
| 18 | Josephine Butler | 8 | Grand-daughter | — | Maryland |
| 19 | Catherine Butler | 4 | Grand-daughter | — | Maryland |
| 20 | Frank Butler | 42 | Son | Laborer | Maryland |
| 21 | James A. Ford | 49 | Head | Farmer | Maryland |
| 22 | Elizabeth Ford | 47 | Wife | — | Maryland |
| 23 | Samuel T. Ford | 16 | Son | Laborer | Maryland |
| 24 | Catherine Ford | 13 | Daughter | — | Maryland |
| 25 | William Ford | 11 | Son | — | Maryland |
| 26 | Walter Thomas | 46 | Head | Laborer | Maryland |
| 27 | Annie Thomas | 39 | Wife | — | Maryland |
| 28 | Ruth Thomas | 16 | Daughter | — | Maryland |
| 29 | Sylvester Thomas | 12 | Son | — | Maryland |
| 30 | Earle Thomas | 10 | Son | — | Maryland |
| 31 | Louise Thomas | 8 | Daughter | — | Maryland |
| 32 | Margaret Thomas | 3 | Daughter | — | Maryland |
| 33 | William H. Blair | 66 | Head | Farmer | Maryland |
| 34 | Alice Blair | 62 | Wife | — | Maryland |
| 35 | William H. J. Blair THIS PERSON | 20 | Son | Laborer | Maryland |
| 36 | Viola Blair | 22 | Daughter | Teacher | Maryland |
| 37 | Joseph M. Marshall | 27 | Head | Merchant | Maryland |
| 38 | Lola Marshall | 24 | Wife | — | Maryland |
| 39 | Henry W. Dyson | 71 | Father-in-law | — | Maryland |
| 40 | Joseph Smith | 50 | Head | Farmer | Maryland |
| 41 | Bertha Smith | 45 | Wife | — | Maryland |
| 42 | Gertrude J. Smith | 23 | Daughter | — | Maryland |
| 43 | Frank L. Smith | 17 | Son | — | Maryland |
| 44 | Mary E. Smith | 19 | Daughter | — | Maryland |
| 45 | Moses Smith | 14 | Son | — | Maryland |
| 46 | Josephine Jackson | 4 | Grand-daughter | — | Maryland |
| 47 | James Jackson | 3 | Grand-son | — | Maryland |
| 48 | Thomas H. Jones | 36 | Head | Farmer | South Carolina |
| 49 | Rosa G. Jones | 32 | Wife | — | South Carolina |
| 50 | Pleasant G. Jr. Jones | 8 | Son | — | South Carolina |
Pedigree Summary
William + 1 sibling
Gen 1 · 5 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)