MH
Mary Haines — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this Mary Haines across the 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 4-person household.
Age 10
b. ~1930
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | Haines |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Frederick City |
| 1935 Residence (County) | Frederick |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Frederick City |
| Est. Birth Year | ~1930 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Marguerite Haines | Daughter | — | 3 | ~1937 |
| Harry Haines | Head | — | 35 | ~1905 |
| Mary Haines | Daughter | — | 10 | ~1930 |
| Eloise Haines | Spouse | — | 31 | ~1909 |
Census Appearances
1930
Frederick, Maryland
Other, age 1
Frederick, Maryland · implied b. ~1929 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hains |
| Given Name | Mary Jane |
| Relationship to Head | Granddaughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Frederick-County, Maryland
Daughter, age 10
Frederick-County, Maryland · implied b. ~1930 — 4 household members
| Surname | Haines |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Frederick City |
| 1935 Residence (County) | Frederick |
| Highest Grade | No 4 |
| 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 Haines across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Haines
Daughter · 1940 · age 10 · b. ~1930 · Maryland
★ You are viewing this record
Sibling
Marguerite Haines
Sibling · 1940 · age 3
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
1940 US Federal Census — Frederick-County, Maryland
Open full size
1940 US Federal Census — Frederick-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01548-00395)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | M. Dolores Pomeroy | 23 | Daughter | Salesgirl | Maryland |
| 42 | John G. Ridenour | 57 | Head | Salesman | Maryland |
| 43 | Laura G. Otis | 69 | Head | — | Maryland |
| 44 | Edgar Buddinger | 23 | Head | Feedmaker | Maryland |
| 45 | Nancy Buddinger | 19 | Wife | — | Maryland |
| 46 | Clara Harrison | 45 | Head | — | Pennsylvania |
| 47 | Robert Harrison | 21 | Son | Salesman | Maryland |
| 48 | Medora Harrison | 19 | Daughter | Secretary | Maryland |
| 49 | Frances Harrison | 17 | Daughter | New Worker | Maryland |
| 50 | James Harrison | 11 | Son | — | Maryland |
| 51 | Arthur Murphy | 45 | Head | — | Maryland |
| 52 | Katherine Murphy | 38 | Wife | Telephone Operator | Maryland |
| 53 | Robert Herrong | 31 | Head | Truck Driver | Maryland |
| 54 | Mildred Herrong | 30 | Wife | — | Maryland |
| 55 | Don Herrong | 6 | Son | — | Maryland |
| 56 | Darlene Herrong | 3 | Daughter | — | Maryland |
| 57 | Merle Thompson | 32 | Head | Dispatcher-Truck | Maryland |
| 58 | Saloma Thompson | 29 | Wife | — | Maryland |
| 59 | Lucille Thompson | 9 | Daughter | — | Maryland |
| 60 | Harry Haines | 35 | Head | Clerk | Pennsylvania |
| 61 | Eloise Haines | 31 | Wife | — | Maryland |
| 62 | Mary Jane Haines THIS PERSON | 10 | Daughter | — | Maryland |
| 63 | Marguerite Haines | 3 | Daughter | — | Maryland |
| 64 | Mary Rich | 73 | Head | — | Maryland |
| 65 | Charles H. Rich | 49 | Son | Brick Layer | Maryland |
| 66 | Helen E. Rich | 45 | Daughter | Bookkeeper | Maryland |
| 67 | Grace C. Rich | 43 | Daughter | Bookkeeper | Maryland |
| 68 | Franklin Tyeryar | 27 | Head | Hosiery Knitter | Maryland |
| 69 | Evelyn Tyeryar | 24 | Wife | — | Maryland |
| 70 | Franklin Jr. Tyeryar | 5 | Son | — | Maryland |
| 71 | James R. Tyeryar | 2 | Son | — | Maryland |
| 72 | Grayson Wachter | 34 | Head | Real Estate Owner | Maryland |
| 73 | Helen Wachter | 31 | Wife | — | Maryland |
| 74 | Darlene Wachter | 5 | Daughter | — | Maryland |
| 75 | Jeannette Wachter | 1 | Daughter | — | Maryland |
| 76 | Patricia Wachter | 0 | Daughter | — | Maryland |
| 77 | Margaret Harpie | 24 | Housekeeper | Housekeeper | Maryland |
| 78 | Clarence L. Atkins | 62 | Head | Apartment Caretaker | Maryland |
| 79 | Irma E. Maff | 31 | Daughter | Stenographer | Maryland |
| 80 | Alton Maff | 35 | Son-in-law | Fire Truck Driver | 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)