MW
Mary Welch — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Multnomah-County, Oregon
Our Model Tree links this Mary Welch across the 1930 and 1940 US Censuses in Multnomah-County, Oregon (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 11-person household.
Age 15
b. ~1925
Female
Daughter
Born: Oregon
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Multnomah-County, Oregon |
| Surname | Welch |
| Given Name | Mary V |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Portland City |
| 1935 Residence (County) | Multnomah |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
| Township / Ward | Portland 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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Nancy Welch | Daughter | — | 7 | ~1933 |
| Mary Welch | Daughter | — | 15 | ~1925 |
| Zoe Welch | Daughter | — | 5 | ~1935 |
| Peter Welch | Head | — | 49 | ~1891 |
| Quinten Welch | Son | — | 10 | ~1930 |
| Vincent Welch | Son | — | 13 | ~1927 |
| Don Welch | Son | — | 4 | ~1936 |
| Thomas Welch | Son | — | 16 | ~1924 |
| James Welch | Son | — | 12 | ~1928 |
| Peter Welch | Son | — | 8 | ~1932 |
| Mildred Welch | Spouse | — | 42 | ~1898 |
Census Appearances
1930
Multnomah, Oregon
Daughter, age 4
Multnomah, Oregon · implied b. ~1926 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welch |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | North Dakota |
| Can Read/Write | Yes |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1940
Multnomah-County, Oregon
Daughter, age 15
Multnomah-County, Oregon · implied b. ~1925 — 11 household members
| Surname | Welch |
| Given Name | Mary V |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Portland City |
| 1935 Residence (County) | Multnomah |
| Class of Worker | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
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 Welch across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Welch
Daughter · 1940 · age 15 · b. ~1925 · Oregon
★ You are viewing this record
Sibling
Vincent Welch
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nancy Welch
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Zoe Welch
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Quinten Welch
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Welch
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Don Welch
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Welch
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Peter Welch
Sibling · 1940 · age 8
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 — Multnomah-County, Oregon
Open full size
1940 US Federal Census — Multnomah-County, Oregon
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03385-00254)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George D Oakes | 38 | Head | Investigator | Washington |
| 2 | Vera H Oakes | 37 | Wife | Personnel Manager | Oregon |
| 3 | Holly D Fager | 41 | Head | Bookkeeper | Washington |
| 4 | Frances W Fager | 44 | Wife | Teacher | Washington |
| 5 | Fred W Robbins | 35 | Head | Operator | Minnesota |
| 6 | Faye O Robbins | 39 | Wife | Operator | Oregon |
| 7 | Herbert Retzlaff | 37 | Head | Office Manager | Germany |
| 8 | Lucy M Retzlaff | 38 | Wife | Teacher | Colorado |
| 9 | Clyde E Simmons | 30 | Head | Draftsman | Texas |
| 10 | Helen Simmons | 31 | Wife | Stenographer | Oregon |
| 11 | Elizabeth S Martine | 60 | Mother-in-law | — | Oregon |
| 12 | Helen G Coghlan | 56 | Head | — | Ohio |
| 13 | John M Coghlan | 24 | Son | Salesman | Oregon |
| 14 | Virginia L Coghlan | 25 | Daughter-in-law | Secretary | Idaho |
| 15 | Amanda Mumm | 44 | Head | Stenographer | Oregon |
| 16 | Ruth A Smith | 26 | Partner | Stenographer | Oregon |
| 17 | Morton J Goodman | 34 | Head | Medical Doctor | Oregon |
| 18 | Edith J Goodman | 27 | Wife | — | Oregon |
| 19 | Robert G Wright | 49 | Head | Lumber Buyer | Nebraska |
| 20 | Katherine J Wright | 41 | Wife | — | Dist. of Col. |
| 21 | Sybil Ross | 48 | Head | Dealer | Oregon |
| 22 | William K Ross | 15 | Son | — | Unknown |
| 23 | Peter W Welch | 49 | Head | Salesman | Oregon |
| 24 | Mildred K Welch | 42 | Wife | — | Maryland |
| 25 | Thomas K Welch | 16 | Son | Paper Boy | Oregon |
| 26 | Mary V Welch THIS PERSON | 15 | Daughter | — | Oregon |
| 27 | Vincent O Welch | 13 | Son | — | Oregon |
| 28 | James J Welch | 12 | Son | — | Oregon |
| 29 | Quinten Welch | 10 | Son | — | Oregon |
| 30 | Peter F Welch | 8 | Son | — | Oregon |
| 31 | Nancy D Welch | 7 | Daughter | — | Oregon |
| 32 | Zoe L Welch | 5 | Daughter | — | Oregon |
| 33 | Don S Welch | 4 | Son | — | Oregon |
| 34 | Margaret N Baird | 61 | Head | — | Scotland |
| 35 | Harry L Ham | 21 | Lodger | — | Arkansas |
| 36 | Mattie Mckeever | 42 | Lodger | Fitter | North Dakota |
| 37 | Ella V Holman | 80 | Head | — | Washington |
| 38 | Alice J Taylor | 44 | Servant | Servant | Oregon |
| 39 | Michael Carney | 52 | Head | Motorman | Irish Free State |
| 40 | Delia Carney | 52 | Wife | — | Irish Free State |
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)