Keshava

https://en.wikipedia.org/wiki/Keshava

https://en.wikipedia.org/wiki/Keshava_Namas

http://d01e.blogspot.com/search/label/24FormsofVishnuConsorts

Adi
https://en.wikipedia.org/wiki/Adikesava_Perumal_temple,_Sriperumpudur
https://en.wikipedia.org/wiki/Adikesava_Perumal_Temple,_Kanyakumari

Chenna
https://en.wikipedia.org/wiki/Chennakesava_Temple,_Somanathapura

Avatars
http://www.wordzz.com/vishnu-source-incarnations/
https://www.youtube.com/results?search_query=24+avatars
http://www.speakingtree.in/allslides/24-incarnations-of-lord-vishnu