Summary of transcription of burial record:
Interment #: 2267.0 (Interment book pg: 100)
Name: Gerrit J Jansen
Birth: Holland
Last Residence: Newton
Gender/Marital Status: M/Married
Death: 11 Jan 1929, cause: Diabetus
Burial: 12 Jan 1929; lot: 56 (5,6,7,8) E 1/2; Lot book pg: 51; undertaker: J. R. Crumpacker
Nearest Relative: Harold Johnson, son
[Source: See Oakwood Cemetery on iagenweb.org/marion]

Note next two censuses and names on the stones connect them together.

Name: Garret J Jansen
Age in 1910: 47
Birth Year: abt 1863
Birthplace: Holland
Home in 1910: Red Rock, Marion, Iowa
Race: White
Gender: Male
Immigration Year: 1872
[1870]
Relation to Head of House: Head
Marital Status: Married
Spouse's Name: Libbie Jansen
Father's Birthplace: Holland
Mother's Birthplace: Holland
Neighbors: View others on page
Household Members:
Name Age
Garret J Jansen 47
Libbie Jansen 38
Perry C Jansen 15
Maria Jansen 12
Grace Jansen 8
Jannette Jansen 6
Harold Jansen 3

Name: Gerit J Johnson
[Garrett J Johnson]
[Gertt J Johnson]
Age: 56
Birth Year: abt 1864
Birthplace: Holland
Home in 1920: Fairview, Jasper, Iowa
House Number: X
Race: White
Gender: Male
Immigration Year: 1872
Relation to Head of House: Head
Marital Status: Married
Spouse's Name: Libby Johnson
Father's Birthplace: Holland
Mother's Birthplace: Holland
Native Tongue: Dutch
Able to Speak English: Yes
Occupation: Minister
Industry: Traveling
Employment Field: Own Account
Home Free or Mortgaged: Mortgaged
Naturalization Status: Naturalized
Neighbors: View others on page
Household Members:
Name Age
Gerit J Johnson 56
Libby Johnson 48
Perry Johnson 25
Grace Johnson 18
Jannette Johnson 15
Harold Johnson 12
Ruth Johnson 8

His wife married again and here is her CA death record (1940 she lives with oldest son Perry)

Name: Libbie Copeland
[Libbie Swallum]
Gender: Female
Birth Date: 30 Apr 1871
Birth Place: Iowa
Death Date: 13 Dec 1954
Death Place: Los Angeles
Father's Surname: Swallow

Name: Gerrit Jansen
Gender: Male
Occupation: zonder beroep
Birth Date: 25 mrt 1863 (25 Mar 1863)
Birth Place: Wageningen, Gelderland, Netherlands
Registration Date: 25 mrt 1863 (25 Mar 1863)
Father: Hendrik Jansen
Mother: Jannetje Sents
Entry Number: 46
FHL Film Number: 000211585