MH
Mary Holland — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Mary Holland across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a spouse (b.~1870), then head of a 3-person household.
Age 70
b. ~1870
Female
Spouse
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Holland |
| Given Name | Mary W |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Industry | H |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1870 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Margaret Holland | Daughter | — | 39 | ~1901 |
| James Holland | Head | — | 74 | ~1866 |
| Mary Holland | Spouse | — | 70 | ~1870 |
Census Appearances
1920
None, Maryland
Spouse, age 45
None, Maryland · implied b. ~1875 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Holland |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laundress |
| Industry | Laundry |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Spouse, age 55
Baltimore, Maryland · implied b. ~1875 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Holland |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 12 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Spouse, age 70
Baltimore-City-County, Maryland · implied b. ~1870 — 3 household members
| Surname | Holland |
| Given Name | Mary W |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Industry | H |
| Highest Grade | H 2 |
| 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 Mary Holland across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Holland
Spouse · 1940 · age 70 · b. ~1870 · Maryland
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01541-00399)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ruth B Wheeden | 27 | Wife | — | Maryland |
| 42 | Carolyn Wheeden | 4 | Daughter | — | Maryland |
| 43 | Howard Brill | 40 | Head | Treasurer | Maryland |
| 44 | Margaret R Brill | 33 | Wife | — | Maryland |
| 45 | James S Holland | 74 | Head | Electric Contractor | Maryland |
| 46 | Mary W Holland THIS PERSON | 70 | Wife | — | Maryland |
| 47 | Margaret G Holland | 39 | Daughter | Clerk | Maryland |
| 48 | William H Colton | 40 | Head | Genl Foreman | W. Virginia |
| 49 | Jessie S Colton | 39 | Wife | — | W. Virginia |
| 50 | Guy Colton | 17 | Son | S | Maryland |
| 51 | William Colton | 15 | Son | S | Maryland |
| 52 | Bertha Colton | 14 | Daughter | S | Maryland |
| 53 | Ann Colton | 7 | Daughter | S | Maryland |
| 54 | Sidney Jamison | 64 | Lodger | — | W. Virginia |
| 55 | Geo Garrett | 20 | Lodger | Oper. Machin. | Maryland |
| 56 | Ann B Nixon | 48 | Head | Waitress | Maryland |
| 57 | Muriel Nixon | 20 | Daughter | Legal Dept. | Maryland |
| 58 | Harriet Nixon | 79 | Lodger | — | England |
| 59 | Martin Hayes | 32 | Head | Chauffeur | Maryland |
| 60 | Margaret Hayes | 29 | Wife | Helper | Maryland |
| 61 | Valentine H Gartrell | 40 | Head | Engineer | Maryland |
| 62 | Alexandra Gartrell | 27 | Wife | — | Maryland |
| 63 | Carroll F Arnold | 42 | Head | Foreman | Pennsylvania |
| 64 | Mary E Arnold | 45 | Wife | — | Ohio |
| 65 | Carroll Arnold | 17 | Son | S | Pennsylvania |
| 66 | Richard Arnold | 15 | Son | S | Pennsylvania |
| 67 | Mary Arnold | 12 | Daughter | S | Pennsylvania |
| 68 | Patricia Arnold | 9 | Daughter | S | Pennsylvania |
| 69 | Eillen Arnold | 8 | Daughter | S | Pennsylvania |
| 70 | Hylton Cecil | 33 | Head | Collector | Maryland |
| 71 | Elizabeth M Cecil | 34 | Wife | — | Maryland |
| 72 | Carl Cecil | 6 | Son | — | Maryland |
| 73 | Beverly Cecil | 3 | Daughter | — | Maryland |
| 74 | Earl Jones | 34 | Lodger | Underwriter | Maryland |
| 75 | Katherine S Todd | 58 | Head | — | Pennsylvania |
| 76 | George Laudet | 24 | Head | Inspector | France |
| 77 | Raymond Laudet | 23 | Wife | — | France |
| 78 | Frederick Heller | 70 | Head | Builder | Germany |
| 79 | Elizabeth Heller | 67 | Wife | — | Germany |
| 80 | John Heller | 29 | Son | Clerk | 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)