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Mary Koch — 1910 US Census Record

Linked across censuses

1910 United States Federal Census · Los Angeles, California

Our Model Tree links this Mary Koch across the 1900 and 1910 US Censuses in Los Angeles, California (XGBoost, ~Confirmed) — first a daughter (b.~1887), then head of a 9-person household.

Age 23 b. ~1887 Female Daughter Born: Germany Single

1910 Census Record Details

Census Year1910
LocationLos Angeles, California
SurnameKoch
Given NameMary
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age23
Marital StatusSingle
BirthplaceGermany
Year of Immigration1889
Father's BirthplaceGermany
Mother's BirthplaceGermany
Additional Details
Can ReadYes
Can WriteYes
Speaks EnglishEnglish
Birth CountryGermany
Birthplace (normalized)germany
Township / WardLos Angeles City Part Of
Est. Birth Year~1887

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 Mary Age Birth yr
Nicholas Koch Son — 21 ~1889
Lilly Koch Daughter — 15 ~1895
William Koch Son — 29 ~1881
Mary Koch Daughter — 23 ~1887
Eddie Koch Son — 19 ~1891
Birdie Koch Other — 2 ~1908
Mary Koch Head — 54 ~1856
Julius Koch Son — 27 ~1883
Ella Koch Daughter — 14 ~1896

Census Appearances

1900
Los Angeles, …
Daughter, age 14
Los Angeles, California · implied b. ~1886 — 12 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Koch
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 14
Marital Status Single
Birthplace Germany
Birth Month Apr
Birth Year 1886
Year of Immigration 1889
Father's Birthplace Germany
Mother's Birthplace Germany
Occupation At School
Can Read Yes
Can Write Yes
Speaks English Yes
Birth Country Germany
Birthplace (normalized) germany
1910
Los Angeles, …
Daughter, age 23
Los Angeles, California · implied b. ~1887 — 9 household members
Surname Koch
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 23
Marital Status Single
Birthplace Germany
Year of Immigration 1889
Father's Birthplace Germany
Mother's Birthplace Germany
Can Read Yes
Can Write Yes
Speaks English English
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.
Linked across censuses
Our Model Tree links Mary Koch across 2 US Census years (1900 and 1910) in Los Angeles, California, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Koch
Daughter · 1910 · age 23 · b. ~1887 · California
★ You are viewing this record
Sibling
Ella Koch
Sibling · 1910 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julius Koch
Sibling · 1910 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eddie Koch
Sibling · 1910 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nicholas Koch
Sibling · 1910 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lilly Koch
Sibling · 1910 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Koch
Sibling · 1910 · age 29
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 — Los Angeles, California Open full size

Page Contents

39 people indexed on this census page (ia:1910:13thcensus1910po0084unit:0776)

Line Name Age Relation Occupation Birthplace
1 Antoinette Faust 3 Daughter — California
2 Frank M Camp 29 Head Machinist Texas
3 Katherine Camp 24 Wife — Illinois
4 George R Camp 4 Son — Indiana
5 Eura Camp 40 Mother-in-law — Illinois
6 John F Manning 46 Head General England
7 Lora A Manning 43 Wife — Iowa
8 Lora Wilda Manning 22 Daughter — California
9 Paul R Manning 2 Son — California
10 Dea F Thompson 24 Roomer Lawyer Wisconsin
11 Sarah Douglas 67 Head Income Indiana
12 George B Harrington 39 Head Manager Rhode Island
13 Grace E Harrington 34 Wife — Rhode Island
14 George L Ream 52 Head Salesman Indiana
15 Lizzie Ream 42 Wife — Illinois
16 Sam S Ream 15 Son Carrier Missouri
17 Thomas W Keyton 47 Brother-in-law Salesman Indiana
18 Paulina Keyton 38 Sister — Indiana
19 Annie R Mayer 72 Head — N Carolina
20 Mary Koch 54 Head — Germany
21 Nicholas Koch 21 Son Blacksmith Germany
22 William Koch 29 Son Repairing Germany
23 Eddie Koch 19 Son Clerk California
24 Mary Koch THIS PERSON 23 Daughter — Germany
25 Lilly Koch 15 Daughter — California
26 Julius Koch 27 Son Driver Germany
27 Ella Koch 14 Daughter — California
28 Birdie Koch 2 Grand Daughter — California
29 Charles Morris 24 Head Clipper Maine
30 Harriet Morris 28 Wife — Maine
31 Jean Morris 12 Daughter — California
32 Charles W Graham 23 Head Cabinet Maker Wisconsin
33 Delphia Graham 20 Wife — Montana
34 James Graham 21 Brother Clerk Wisconsin
35 Verna Graham 18 Sister — Wisconsin
36 Mary Graham 17 Sister Operator Wisconsin
37 Helen Graham 13 Sister — Wisconsin
38 John Graham 11 Son — Wisconsin
39 Eugene Graham 8 Son — California

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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)

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