go here:

http://library.pclc.lib.fl.us/historical/

then select:
Online Resources

then select:
Index to Polk County Marked Burials
(15 hits for ENFINGER)

this resource has 3 hits for ENFINGER:
Index to Polk County Obituaries 1881-1960

23 hits:
Index to Polk County Marriages 1862-2000


browse around - use soundex...there is a lot of info online here...


sometimes you can find some info at http://www.findagrave.com/


good luck!