He is married to Mary Ann Luke.
They got married on December 26, 1887 at Johnson, Iowa, United States, he was 27 years old.Source 4
Child(ren):
Record for Casper Miller/ Ancestry.com
Record for Elizabeth Studor/ Ancestry.com
Jacob Miller, "Iowa, County Marriages, 1838-1934"/ FamilySearch
Jacob C Miller/ FamilySearch
Jacob C Miller, "Iowa, Death Records, 1904-1951"/ FamilySearch
Jacob C Miller, "Find A Grave Index"/ FamilySearch