Source : Webster's Revised Unabridged Dictionary (1913)

Mortgager \Mort"ga*ger\, n. (Law)
   gives a mortgage.

Source : WordNet®

mortgager
     n : the person who gives a mortgage in return for money to be
         repaid; "we became mortgagors when the bank accepted our
         mortgage and loaned us the money to buy our new home"
         [syn: {mortgagor}]