Omke Dekkuiga, Feb 1840 Gretchen Dekkuiga, May 1842
"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MS7M-VWL : accessed 26 Oct 2014), Omke Dekkuiga, Precinct 32 Lake Township Chicago city Ward 31, Cook, Illinois, United States; citing sheet 1A, family 9, NARA microfilm publication T623, FHL microfilm 1240285.