MW
Mary Wolf — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Ramsey-County, North Dakota
Our Model Tree links this Mary Wolf across the 1920, 1930 and 1940 US Censuses in Ramsey-County, North Dakota (XGBoost, ~Confirmed) — first a spouse (b.~1880), then head of a 5-person household.
Age 60
b. ~1880
Female
Spouse
Born: Germany
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Ramsey-County, North Dakota |
| Surname | Wolf |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Germany |
| 1935 Residence (City) | Ontario Township |
| 1935 Residence (County) | Ramsey |
| Naturalization Status | Naturalized |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | G 3 |
| 1935 Residence | Same place |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
| Township / Ward | Ontario Township |
| Est. Birth Year | ~1880 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Evangeline Wolf | Daughter | — | 17 | ~1923 |
| Alois Wolf | Head | — | 65 | ~1875 |
| Frank Wolf | Son | — | 30 | ~1910 |
| Vincent Wolf | Son | — | 22 | ~1918 |
| Mary Wolf | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Ramsey, North …
Spouse, age 40
Ramsey, North Dakota · implied b. ~1880 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wulfe |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Germany |
| Year of Immigration | 1884 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Birth Country | Germany |
| Year of Naturalization | 1895 |
| Birthplace (normalized) | germany |
1930
Ramsey, North …
Spouse, age 50
Ramsey, North Dakota · implied b. ~1880 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wolfe |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Germany |
| Naturalization Status | Naturalized |
| Year of Immigration | 1889 |
| Age at First Marriage | 21 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
1940
Ramsey-County, North …
Spouse, age 60
Ramsey-County, North Dakota · implied b. ~1880 — 5 household members
| Surname | Wolf |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Germany |
| 1935 Residence (City) | Ontario Township |
| 1935 Residence (County) | Ramsey |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Highest Grade | G 3 |
| 1935 Residence | Same place |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
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 Wolf across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Wolf
Spouse · 1940 · age 60 · b. ~1880 · North Dakota
★ 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 — Ramsey-County, North Dakota
Open full size
1940 US Federal Census — Ramsey-County, North Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03010-00453)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Stanley Rohr | 12 | Son | — | North Dakota |
| 2 | Trevina Serbert | Gerbert | 35 | Daughter | — | North Dakota |
| 3 | John Fischer | 5 | Son | — | North Dakota |
| 4 | Alois Wolf | 65 | Head | Farm Work | Germany |
| 5 | Mary Wolf THIS PERSON | 60 | Wife | — | Germany |
| 6 | Frank Wolf | 30 | Son | Farm Work | North Dakota |
| 7 | Vincent R. Wolf | 22 | Son | Farm Work | North Dakota |
| 8 | Evangeline Wolf | 17 | Daughter | — | North Dakota |
| 9 | Sebastian Senger | 59 | Head | — | Russia |
| 10 | Helena Senger | 52 | Wife | — | Russia |
| 11 | Anton Senger | 24 | Son | Farm Labor | North Dakota |
| 12 | Sebastian Senger | 21 | Son | Farm Labor | North Dakota |
| 13 | Steve Senger | 19 | Son | Farm Labor | North Dakota |
| 14 | Katherine Senger | 16 | Daughter | — | North Dakota |
| 15 | Louise Senger | 14 | Daughter | — | North Dakota |
| 16 | Joe Senger | 23 | Son | — | North Dakota |
| 17 | Mike S. Senger | 26 | Head | Farm Labor | North Dakota |
| 18 | Eva Senger | 22 | Wife | — | North Dakota |
| 19 | Mike J. Kraft | 38 | Head | Farm Labor | North Dakota |
| 20 | Catherine S. Kraft | 38 | Wife | — | North Dakota |
| 21 | Alfred B. Kraft | 5 | Son | 0 | North Dakota |
| 22 | Gary J. Murray | 30 | Head | Farm Work | North Dakota |
| 23 | Ruth L. Murray | 27 | Wife | — | North Dakota |
| 24 | George J. Murray | 5 | Son | 0 | North Dakota |
| 25 | Albert J. Murray | 41 | Head | Farm Work | North Dakota |
| 26 | Archie G. Murray | 43 | Brother | Farm Work | North Dakota |
| 27 | Leo A. Dettling | 36 | Employee | Farm Work | North Dakota |
| 28 | Francis Dettling | 43 | Employee | House Work | North Dakota |
| 29 | Margaret G. Dettling | 1 | Sister | 0 | North Dakota |
| 30 | Norman H. Gudme | 45 | Head | Farm Work | North Dakota |
| 31 | Margaret S. Gudme | 37 | Wife | — | North Dakota |
| 32 | Kenneth L. Gudme | 9 | Son | — | North Dakota |
| 33 | Betty M. Gudme | 7 | Daughter | — | North Dakota |
| 34 | Harvey A. Gudme | 4 | Son | 0 | North Dakota |
| 35 | Frank S. Gefre | Gefroe | 53 | Head | Farm Work | Denmark |
| 36 | Bertha Gefre | Gefroe | 53 | Wife | — | North Dakota |
| 37 | Anton A. Gefre | Gefroe | 20 | Son | Farm Work | North Dakota |
| 38 | Lawrence C. Gefre | Gefroe | 19 | Son | Farm Work | North Dakota |
| 39 | Doris E. Gefre | Gefroe | 13 | Daughter | — | North Dakota |
| 40 | Deloris R. Gefre | Gefroe | 9 | Daughter | — | North Dakota |
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)