From what I understand the 'Ri' in Ri'Sava usually stands for Status on leadership. The 'Ji' in Ji'Sava one stands for young Bachelor, but not too bright in the head. This also counts for 'J' and 'Ja' at the beginning instead. As for S'Renji the 'S' simply means adult.
I simpy named my Khajiit Zahraji. Depends on what type of character you want I suppose. I like S'Renji and Ri'Sava personally. Hope I helped. I don't know if you knew those prefixes already, but for me it just depends on what character I want. For Ri'Sava he would probably be a big guy with strength, Ji'Sava probably wouldn't be a mage. Perhaps a clumsy assassin/thief or warrior. S'Renji could be well, anything. A young adult male Khajiit lol.
Just some ideas.