Be sure to cross-check the death certificates of your ancestor’s siblings. My great-grandfather's mother was a mystery. Her first name had been listed as Eleanor, Elender, and Elvira in different census records. There was also a question about her last name. Unfortunately, the death certificate of my great-grandfather was hard to read. I couldn't make out his mother's name with certainty. So I looked for his siblings' death certificates and compared them all to figure it out. Now I search and save death certificates of all siblings. It's also helpful in making sure I have the right brothers and sisters listed.
Other articles in the 15 January 2012 Weekly Discovery: