Scrolled through the "Social Security Death Index: U.S., 1937-1997" on CD-ROM and found ten persons with the surname WENSELL reported there. Their Social Security #'s were issued in Pennsylvania; too, their last known Zip Code was in the state of Pennsylvania. But there were many, many more whose surname was WENSEL (spelled with just one "L"). They also had ties to Pennsylvania.
It is not at all unusual to find more than one possible spelling of a family surname, since many persons spelled phonetically. The Library of Congress, the National Archives and Records Service, and other major archival repositories have a compendium called a "Soundex".
It provides varied spellings of a family surname; also, directs the researcher to the location of persons in Census and other public records.
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Best wishes with your search.
Louise Daniel Hutchinson