Christi (Kristy if you want different spelling), Crissy, Chrissy, Tina, or if you meant Christiana, you can use Ana, one of my friends uses that only she says is like "Anna".
Christina agullara is a good singer darling
Christina Sarros goes by Chrissy.
Christina Sbraccia goes by Sbraccia.
Christina Sinclair goes by Tina.
Christina Sewell goes by Chrissy.
Christina Stiles goes by CC.
Christina Wren goes by Tina.
Christina Amphlett went by Chrissy.
Christina Brouder goes by Bini.
Christina Potter goes by Tina.
Christina Nikitas goes by Giggles.
Christina Ollson goes by Tank.