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Bertha Lewis — 1910 US Census Record
Linked across censuses1910 United States Federal Census · Boulder, Colorado
Our Model Tree links this Bertha Lewis across the 1900 and 1910 US Censuses in Boulder, Colorado (XGBoost, ~Confirmed) — first a daughter (b.~1890), then head of a 9-person household.
Age 20
b. ~1890
Female
Daughter
Born: Nebraska
Single
1910 Census Record Details
| Census Year | 1910 |
| Location | Boulder, Colorado |
| Surname | Lewis |
| Given Name | Bertha G. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
| Township / Ward | Boulder City |
| Est. Birth Year | ~1890 |
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.
9 people recorded at the same address in the 1910 census.
| Name | Relation to head | Relative to Bertha | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Lewis | Daughter | — | 7 | ~1903 |
| John Lewis | Son | — | 14 | ~1896 |
| Elizabeth Lewis | Daughter | — | 18 | ~1892 |
| Bertha Lewis | Daughter | — | 20 | ~1890 |
| Marguerite Lewis | Daughter | — | 12 | ~1898 |
| Lyman Lewis | Son | — | 5 | ~1905 |
| Maria Lewis | Daughter | — | 16 | ~1894 |
| Ruth Lewis | Daughter | — | 10 | ~1900 |
| Sadie Lewis | Head | — | 43 | ~1867 |
Census Appearances
1900
Boulder, Colorado
Daughter, age 10
Boulder, Colorado · implied b. ~1890 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lewis |
| Given Name | Bertha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Birth Month | July |
| Birth Year | 1890 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Illinois |
| Occupation | At School |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1910
Boulder, Colorado
Daughter, age 20
Boulder, Colorado · implied b. ~1890 — 9 household members
| Surname | Lewis |
| Given Name | Bertha G. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
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 Bertha Lewis across 2 US Census years (1900 and 1910) in Boulder, Colorado, using XGBoost record linkage.
Show:
This person
Anchor record
Bertha Lewis
Daughter · 1910 · age 20 · b. ~1890 · Colorado
★ You are viewing this record
Sibling
Maria Lewis
Sibling · 1910 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lyman Lewis
Sibling · 1910 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marguerite Lewis
Sibling · 1910 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Lewis
Sibling · 1910 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Lewis
Sibling · 1910 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Lewis
Sibling · 1910 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Lewis
Sibling · 1910 · age 14
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
1910 US Federal Census — Boulder, Colorado
Open full size
1910 US Federal Census — Boulder, Colorado
Page Contents
47 people indexed on this census page (ia:1910:13thcensus1910po0113unit:0736)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 4 | Henry Knause | 53 | Head | Farmer | Germany |
| 5 | Mildred Knause | 17 | Daughter | — | Iowa |
| 6 | George Knause | 14 | Son | — | Colorado |
| 7 | Ida Knause | 11 | Daughter | — | Colorado |
| 8 | Samuel Knause | 10 | Son | — | Colorado |
| 9 | Clarence Knause | 10 | Son | — | Colorado |
| 10 | John O'Connor | 42 | Head | Stationary Engineer | Oregon |
| 11 | Harriet O'Connor | 41 | Wife | — | Pennsylvania |
| 12 | George W. Wheatley | 11 | Step-son | — | Kansas |
| 13 | Ethel O'Connor | 13 | Daughter | — | Colorado |
| 14 | John R. O'Connor | 6 | Son | — | Colorado |
| 15 | Ruth O'Connor | 3 | Daughter | — | Colorado |
| 16 | Joseph J. Lewis | 44 | Head | Fireman | New York |
| 17 | Martha Lewis | 45 | Wife | — | Michigan |
| 18 | Catherine E. Lewis | 12 | Daughter | — | Michigan |
| 19 | John G. Lewis | 7 | Son | — | Michigan |
| 20 | James Milton | 66 | Head | Farmer | Indiana |
| 21 | Mary S. Milton | 63 | Wife | — | Iowa |
| 22 | Edward Jennings | 33 | Head | Bookkeeper | Canada |
| 23 | Bertha Jennings | 28 | Wife | — | Canada |
| 24 | Mary Jennings | 9 | Daughter | — | Colorado |
| 25 | Ruth Jennings | 6 | Daughter | — | Colorado |
| 26 | Ethel Jennings | 4 | Daughter | — | Colorado |
| 27 | Alice Jennings | 1 | Daughter | — | Colorado |
| 28 | Sadie Lewis | 43 | Head | — | Illinois |
| 29 | Bertha G. Lewis THIS PERSON | 20 | Daughter | — | Nebraska |
| 30 | Elizabeth Lewis | 18 | Daughter | — | Nebraska |
| 31 | Maria E. Lewis | 16 | Daughter | — | Colorado |
| 32 | John Lewis | 14 | Son | — | Colorado |
| 33 | Marguerite Lewis | 12 | Daughter | — | Colorado |
| 34 | Ruth Lewis | 10 | Daughter | — | Colorado |
| 35 | Dorothy Lewis | 7 | Daughter | — | Colorado |
| 36 | Lyman Lewis | 5 | Son | — | Colorado |
| 37 | Christopher Gross | 45 | Head | Farmer | England |
| 38 | Louisa J. Gross | 36 | Wife | — | England |
| 39 | Bessie J. Gross | 13 | Daughter | — | Colorado |
| 40 | Alice F. Gross | 12 | Daughter | — | Colorado |
| 41 | Lydia Gross | 9 | Daughter | — | Colorado |
| 42 | Christopher Gross | 7 | Son | — | Colorado |
| 43 | Dora Gross | 5 | Daughter | — | Colorado |
| 44 | Florence Gross | 2 | Daughter | — | Colorado |
| 45 | Clarence Hale | 37 | Head | Farmer | Missouri |
| 46 | Lulu Hale | 34 | Wife | — | Illinois |
| 47 | Freda Hale | 15 | Daughter | — | Missouri |
| 48 | Lola Hale | 12 | Daughter | — | Colorado |
| 49 | Thelma Hale | 10 | Daughter | — | Colorado |
| 50 | Eunice Hale | 8 | Daughter | — | Colorado |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1910 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)