Source : Webster's Revised Unabridged Dictionary (1913)

Mortgageor \Mort"gage*or\, Mortgagor \Mort"ga*gor\, n. (Law)
   One who gives a mortgage.

   Note: The letter e is required analogically after the second
         g in order to soften it; but the spelling mortgagor is
         in fact the prevailing form. When the word is
         contradistinguished from mortgagee it is accented on
         the last syllable (?).