MK
Mary Kline — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this Mary Kline across the 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 7-person household.
Age 15
b. ~1925
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | Kline |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Frederick City |
| 1935 Residence (County) | Frederick |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Frederick City |
| Est. Birth Year | ~1925 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Kline | Daughter | — | 15 | ~1925 |
| Charles Kline | Head | — | 44 | ~1896 |
| Catherine Kline | Daughter | — | 14 | ~1926 |
| Helen Kline | Daughter | — | 19 | ~1921 |
| Idella Kline | Spouse | — | 36 | ~1904 |
| Betty Kline | Daughter | — | 13 | ~1927 |
| Margaret Kline | Daughter | — | 17 | ~1923 |
Census Appearances
1930
Frederick, Maryland
Daughter, age 5
Frederick, Maryland · implied b. ~1925 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kline |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| 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 15
Frederick-County, Maryland · implied b. ~1925 — 7 household members
| Surname | Kline |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Frederick City |
| 1935 Residence (County) | Frederick |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| 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 Kline across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kline
Daughter · 1940 · age 15 · b. ~1925 · Maryland
★ You are viewing this record
Sibling
Catherine Kline
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Kline
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Kline
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Kline
Sibling · 1940 · age 19
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-t0627-01548-00423)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elmer B. Barnes | 47 | Lodger | Solicitor | Maryland |
| 42 | Earl C. Cake | 27 | Lodger | Egg Grader | Virginia |
| 43 | Meredith Alexander | 24 | Lodger | Machinist | Maryland |
| 44 | Charles Theodore | 52 | Lodger | Salesman | Maryland |
| 45 | Harry F. Brown | 50 | Head | Brakeman | Maryland |
| 46 | Maude H. Brown | 48 | Wife | — | Maryland |
| 47 | Fannie Scheel | 73 | Head | — | Maryland |
| 48 | Edward C. Scheel | 72 | Brother | — | Maryland |
| 49 | Phillip Scheel | 70 | Brother | — | Maryland |
| 50 | Mealy Weiner | 80 | Sister | — | Maryland |
| 51 | Beckey L. Boyer | 80 | Head | — | Maryland |
| 52 | William R. Boyer | 53 | Son | Clerk | Maryland |
| 53 | Ital M. Brandt | 51 | Daughter | Looper | Maryland |
| 54 | Fannie Hersig | 46 | Daughter | — | Maryland |
| 55 | Clara A. Hersig | 44 | Granddaughter | Salesman | Maryland |
| 56 | Betty R. Hersig | 17 | Granddaughter | — | Maryland |
| 57 | Marshall S. Barger | 21 | Head | Truck Driver | Maryland |
| 58 | Elsie M. Barger | 19 | Wife | — | Maryland |
| 59 | Jo Anna Barger | 0 | Daughter | — | Maryland |
| 60 | Isaac S. Hammond | 29 | Head | Farmer | Maryland |
| 61 | Florence Hammond | 25 | Wife | Topper | Maryland |
| 62 | Gertrude Marson | 26 | Head | Topper | West Virginia |
| 63 | Sarah A. Hautsch | 20 | Lodger | Topper | Maryland |
| 64 | (Extra Line In Error From Neighbor'S Information) | None | — | — | — |
| 65 | Aubrey L. Cannon | 33 | Head | Laborer | Virginia |
| 66 | Lillian E. Cannon | 63 | Mother | Housekeeper | Maryland |
| 67 | William M. Nottleson | 42 | Head | — | Maryland |
| 68 | Mary M. Nottleson | 42 | Wife | — | Maryland |
| 69 | Alvin S. Nottleson | 23 | Son | Laborer | Maryland |
| 70 | Russell W. Nottleson | 18 | Son | New Worker | Maryland |
| 71 | Rudolph J. Nottleson | 15 | Son | — | Maryland |
| 72 | Christine Nottleson | 12 | Daughter | — | Maryland |
| 73 | Betty J. Nottleson | 9 | Daughter | — | Maryland |
| 74 | Charles E. Kline | 44 | Head | Shaper | Maryland |
| 75 | Idella Kline | 36 | Wife | — | Maryland |
| 76 | Helen E. Kline | 19 | Daughter | Topper | Maryland |
| 77 | Margaret R. Kline | 17 | Daughter | — | Maryland |
| 78 | Mary L. Kline THIS PERSON | 15 | Daughter | — | Maryland |
| 79 | Catherine M. Kline | 14 | Daughter | — | Maryland |
| 80 | Betty J. Kline | 13 | Daughter | — | 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)