Vishnu sahasranamam, sloka16

Slóka15:       Bhrajishnu  bhojanam  bhoktha  sahishnu  jagaDaaDijah
                    Anagho  vijayo  jetha  viswayonihi  punarvasuhu

One disposition of Vishnu is Jishnu. The all spreading  Jishnu is " Bhrajishnu." Jishnu is Jeeva only.  "Jeeva" is a special entity, " the Life", which sustains  the beings and the universe. 
The food,  the assimilater of food, Friend,  the one existing from the beginning of the universe, the flawless, the successful,  the victorious,  the universal   channel of origination , the star Punarvasu, is sri maha Vishnu.

Vishnu, Jishnu, Sahishnu are all different descriptive  functional names of the one and the only one, "Paramaathma".
          
                        Om Vishnave namaha