Family tree▼
"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MKT9-QKS : accessed 06 Oct 2013), Jacob Jacobs in entry for Charles Doornlos, 1910.
"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M9NV-86W : accessed 06 Oct 2013), Jacob Jacobs, 1900.