MB
Mary Blair — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Charles, Maryland
Our Model Tree links this Mary Blair across the 1900, 1910 and 1920 US Censuses in Charles, Maryland (XGBoost, ~Confirmed) — first a spouse (b.~1871), then head of a 7-person household.
Age 49
b. ~1871
Female
Spouse
Born: Maryland
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Charles, Maryland |
| Surname | Blair |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | 3Rd Dist Cross Roads Part Of |
| Est. Birth Year | ~1871 |
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 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Blair | Daughter | — | 14 | ~1906 |
| Fannie Blair | Daughter | — | 35 | ~1885 |
| William Blair | Head | — | 64 | ~1856 |
| Oscar Blair | Other | — | ~1920 | |
| James Blair | Other | — | 7 | ~1913 |
| Laurell Blair | Son | — | 11 | ~1909 |
| Mary Blair | Spouse | — | 49 | ~1871 |
Census Appearances
1900
Charles, Maryland
Spouse, age 30
Charles, Maryland · implied b. ~1870 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Maryland |
| Birth Month | Aug |
| Birth Year | 1870 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1910
Charles, Maryland
Spouse, age 39
Charles, Maryland · implied b. ~1871 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Mulatto |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Maryland |
| Years Married | 11 |
| Children Born | 8 |
| Children Living | 5 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1920
Charles, Maryland
Spouse, age 49
Charles, Maryland · implied b. ~1871 — 7 household members
| Surname | Blair |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| 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 Mary Blair across 3 US Census years (1900, 1910 and 1920) in Charles, Maryland, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Blair
Spouse · 1920 · age 49 · b. ~1871 · Maryland
★ You are viewing this record
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:0077)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | William Blair | 64 | Head | Laborer | Maryland |
| 52 | Mary Blair THIS PERSON | 49 | Wife | None | Maryland |
| 53 | Dorothy Blair | 14 | Daughter | None | Maryland |
| 54 | Fannie Blair | 35 | Daughter | None | Maryland |
| 55 | Laurell Blair | 11 | Son | None | Maryland |
| 56 | James Louise Blair | 7 | Granddaughter | None | Maryland |
| 57 | Oscar Blair | 0 | Grandson | None | Maryland |
| 58 | Berry Posey | 53 | Head | Farmer | Maryland |
| 59 | Sarah Posey | 19 | Daughter | None | Maryland |
| 60 | John Posey | 51 | Brother | Laborer | Maryland |
| 61 | Charles J Gilroy | 51 | Head | Carpenter | Maryland |
| 62 | Cora Gilroy | 41 | Wife | None | Maryland |
| 63 | Violet E Gilroy | 19 | Daughter | None | Maryland |
| 64 | Charles E Gilroy | 17 | Son | Laborer | Maryland |
| 65 | Lorene F Gilroy | 14 | Daughter | None | Maryland |
| 66 | Edna H Gilroy | 12 | Daughter | None | Maryland |
| 67 | Julian M Gilroy | 10 | Son | None | Maryland |
| 68 | Josephine M Gilroy | 7 | Daughter | None | Maryland |
| 69 | Emma M Gilroy | 3 | Daughter | None | Maryland |
| 70 | Lawrence W Gilroy | 0 | Son | None | Maryland |
| 71 | Thomas Gilroy | 48 | Head | Farmer | Maryland |
| 72 | Mary Gilroy | 46 | Wife | None | Maryland |
| 73 | Viola Gilroy | 16 | Daughter | None | Maryland |
| 74 | Ethel Gilroy | 12 | Daughter | None | Maryland |
| 75 | Mildred Gilroy | 10 | Daughter | None | Maryland |
| 76 | Frank Gilroy | 9 | Son | None | Maryland |
| 77 | Segren Gilroy | 7 | Daughter | None | Maryland |
| 78 | Alice Gilroy | 1 | Daughter | None | Maryland |
| 79 | Richard Gilroy | 45 | Head | Farmer | Maryland |
| 80 | Annie Gilroy | 33 | Wife | None | Maryland |
| 81 | Bernard Gilroy | 14 | Son | None | Maryland |
| 82 | Berry Gilroy | 12 | Son | None | Maryland |
| 83 | Mitchell Gilroy | 9 | Son | None | Maryland |
| 84 | John Louis Gilroy | 6 | Son | None | Maryland |
| 85 | Paul Gilroy | 2 | Son | None | Maryland |
| 86 | Nancy Posey | 53 | Head | None | Maryland |
| 87 | Edison Posey | 15 | Son | None | Maryland |
| 88 | Edna Posey | 9 | Daughter | None | Maryland |
| 89 | Caroline Posey | 13 | Daughter | None | Maryland |
| 90 | Gladys Posey | 5 | Daughter | None | Maryland |
| 91 | Leroy Posey | 1 | Daughter | None | Maryland |
| 92 | Francis Henderson | 74 | Head | None | Maryland |
| 93 | William Gilroy | 42 | Head | Farmer | Maryland |
| 94 | Margaret Gilroy | 37 | Wife | None | Maryland |
| 95 | Emma J Gilroy | 12 | Daughter | None | Maryland |
| 96 | William R Gilroy | 9 | Son | None | Maryland |
| 97 | Samuel Z Gilroy | 7 | Son | None | Maryland |
| 98 | Wilder A Gilroy | 5 | Son | None | Maryland |
| 99 | Ennis M Gilroy | 2 | Son | None | Maryland |
| 100 | Effie May E Gilroy | 0 | Daughter | None | Maryland |
Related Census Records
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)