Notes:

1900 US Federal Census;
This census really had their names misspelled, but all of the data is consistent:

Source Citation: Year: 1900; Census Place: Chicago Ward 9, Cook, Illinois; Roll: T623 254; Page: 2A; Enumeration District: 237.

1900 United States Federal Census 1900 United States Federal Census
Name: Adela Saccek
Home in 1900: Chicago Ward 9, Cook, Illinois
Age: 12
Birth Date: Dec 1887
Birthplace: Illinois
Race: White
Ethnicity: American
Gender: Female
Relationship to Head of House: Daughter
Father's Name: Vaclovo
Father's Birthplace: Bohemia
Mother's Name: Barta
Mother's Birthplace: Bohemia
Marital Status: Single
Residence : Chicago City, Cook, Illinois
Occupation: View on Image
Household Members: Name Age
Vaclovo Saccek 42
Barta Saccek 33
Lillie Saccek 12
Adela Saccek 12
Kamila Saccek 6
Otto Saccek 4
Loyla Saccek 2

Source Citation: Year: 1900; Census Place: Chicago Ward 9, Cook, Illinois; Roll T623_254; Page: 2A; Enumeration District: 237.

1910 US Federal Census for Chicago City, Cook, IL She is 21 & single Looks like she was a twin to Lillie.

Source Citation: Year: 1910; Census Place: Chicago Ward 10, Cook, Illinois; Roll: T624_251; Page: 33A; Enumeration District: 538; Image: 798.

Name: Adela Zajicek
Age in 1910: 21
Estimated Birth Year: abt 1889
Birthplace: Illinois
Relation to Head of House: Daughter
Father's Name: Vaclav
Father's Birth Place: Austria
Mother's Name: Barbora
Mother's Birth Place: Austria
Home in 1910: Chicago Ward 10, Cook, Illinois
Marital Status: Single
Race: White
Gender: Female
Neighbors: View others on page
Household Members: Name Age
Vaclav Zajicek 54
Barbora Zajicek 44
Lillie Zajicek 21
Adela Zajicek 21
Kamila Zajicek 16
Otto Zajicek 13
Olga Zajicek 11
William Zajicek 9
Blanche Zajicek 6

1920 United States Federal Census 1920 United States Federal Census
Name: Adeline Nejdl
Home in 1920: Cicero, Cook, Illinois
Age: 31 years
Estimated birth year: abt 1889
Birthplace: Illinois
Relation to Head of House: Wife
Spouse's name: John
Father's Birth Place: Bohemia
Mother's Birth Place: Illinois
Marital Status: Married
Race: White
Sex: Female
Able to read: Yes
Able to Write: Yes
Image: 453
Neighbors: View others on page
Household Members: Name Age
John Nejdl 32
Adeline Nejdl 31
John W Nejdl 4 4/12
Kamile Nejdl 5/12

Source Citation: Year: 1920;Census Place: Cicero, Cook, Illinois; Roll T625_359; Page: 13A; Enumeration District: 46; Image: 453.

1930 United States Federal Census 1930 United States Federal Census
Name: Adela Bukurov
Home in 1930: Chicago, Cook, Illinois
View Map
Age: 41
Estimated birth year: abt 1889
Relation to Head of House: Wife
Spouse's name: Sam
Race: White
Household Members: Name Age
Sam Bukurov 41
Adela Bukurov 41
John Bukurov 14
Camillia Bukurov 13

Source Citation: Year: 1930; Census Place: Chicago, Cook, Illinois; Roll 444; Page: 28A; Enumeration District: 661; Image: 588.0.

In 2009, Gertrude Blecha thought that Adele's husband had left her early in their marriage and never returned. I'm now thinking that this may have been her second husband. I believe her first husband, Nedjl died in the 1920's. In the 1957 obituary for Camille Copeland, her sister, she's going by the name Nedjl again, but we can see from the 1930 census that she had remarried to Samuel Bukurov. I suspect that Bukurov may have left.

Social Security Death Index Social Security Death Index
Name: Adela Nejdl
SSN: 346-01-4971
Last Residence: 60623 Chicago, Cook, Illinois, United States of America
Born: 7 Nov 1888
Died: Nov 1972
State (Year) SSN issued: Illinois (Before 1951)

Source Citation: Number: 346-01-4971;Issue State: Illinois;Issue Date: Before 1951.

Family/Spouse: Samuel BUKUROV. Samuel was born about 1889 in Hungary. [Group Sheet] [Family Chart]

Family/Spouse: John NEJDL. John was born about 1888 in IL. [Group Sheet] [Family Chart]

Notes:

1920 United States Federal Census 1920 United States Federal Census
Name: John W Nejdl
Home in 1920: Cicero, Cook, Illinois
Age: 4 years 4 months
Estimated birth year: abt 1915
Birthplace: Illinois
Relation to Head of House: Son
Father's Name: John
Father's Birth Place: Illinois
Mother's Name: Adeline
Mother's Birth Place: Illinois
Marital Status: Single
Race: White
Sex: Male
Image: 453
Neighbors: View others on page
Household Members: Name Age
John Nejdl 32
Adeline Nejdl 31
John W Nejdl 4 4/12
Kamile Nejdl 5/12

Source Citation: Year: 1920;Census Place: Cicero, Cook, Illinois; Roll T625_359; Page: 13A; Enumeration District: 46; Image: 453.

1930 United States Federal Census 1930 United States Federal Census
Name: John Bukurov
Home in 1930: Chicago, Cook, Illinois
View Map
Age: 14
Estimated birth year: abt 1916
Relation to Head of House: Son
Father's Name: Sam
Mother's Name: Adela
Race: White
Household Members: Name Age
Sam Bukurov 41
Adela Bukurov 41
John Bukurov 14
Camillia Bukurov 13

Source Citation: Year: 1930; Census Place: Chicago, Cook, Illinois; Roll 444; Page: 28A; Enumeration District: 661; Image: 588.0.

Social Security Death Index Social Security Death Index
Name: John Nejdl
SSN: 365-09-8465
Born: 4 Sep 1915
Died: Mar 1973
State (Year) SSN issued: Michigan (Before 1951)

Source Citation: Number: 365-09-8465;Issue State: Michigan;Issue Date: Before 1951.

Cook County, Illinois Death Index, 1908-1988 Cook County, Illinois Death Index, 1908-1988
Name: John Nejdl
Death Date: 28 Mar 1973
Death Location: Cook County, IL
File Number: 609088
Archive collection name: Cook County Genealogy Records (Deaths)
Archive repository location: Chicago, IL
Archive repository name: Cook County Clerk

Source Information:

Ancestry.com. Cook County, Illinois Death Index, 1908-1988 [database on-line]. Provo, UT, USA: The Generations Network, Inc., 2008. Original data: Cook County Clerk. Cook County Clerk Genealogy Records. Cook County Clerk’s Office, Chicago, IL: Cook County Clerk, 2008.

John married Frances J WEBER on 30 Dec 1947 in Chicago, Cook County, IL. [Group Sheet] [Family Chart]