Perhaps you should try some spelling variations:
"cornelis gilbert gerrit jan jan steensel" » "cornelis gilbert geert jan jan steensel" (Expand Search), "cornelis gilbert gerrit janse jan steensel" (Expand Search), "cornelis gilbert gerrit jang jae steensel" (Expand Search), "cornelis gilbert gerrit kuan jan steensel" (Expand Search), "cornelius gilbert gerrit jan jan steensel" (Expand Search), "dscornelis gilbert gerrit jan jan steensel" (Expand Search), "corners gilbert gerrit jan jan steensel" (Expand Search)
"cornelia gijsbert gerrit jan van steensel" » "cornelia gijsbert geert jan van steensel" (Expand Search), "cornelia gijsbert gerrit janse van steensel" (Expand Search), "cornelia gijsbert gerrit dang van steensel" (Expand Search), "cornelia gijsbert gerrit tang van steensel" (Expand Search), "cornelia ginsberg gerrit jan van steensel" (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"cornelis gilbert gerrit jan jan steensel\") OR (\"cornelia gijsbert gerrit jan van steensel\"))~".
• Removing quotes may allow a broader search: (( cornelis gilbert gerrit jan jan steensel ) OR ( cornelia gijsbert gerrit jan van steensel ))~.
• Adding a wildcard symbol may retrieve word variants: (("cornelis gilbert gerrit jan jan steensel") OR ("cornelia gijsbert gerrit jan van steensel"))*.