Many databases will be titled something like “Blah Blah Records of Blah Blah: 1800-1900.” Always try and determine just years are really included in the database. It could be that the “Blah Blah Records of Blah Blah: 1800-1900” actually only contains entries for:
Read the “more about,” “FAQ,” or whatever they call it to determine just how complete the database is. If necessary, browse the records to determine the time periods that are actually included in the database.
The Blah Blah database includes records between 1800 and 1900, but there are gaps. And of course, your person of interest lived in the area from 1830 until 1840…and his grandson lived there from 1892-1898.