Hi there,
a friend of mine is Russian, she's baptised
Ekaterina (from Katherine=pure), and as with most Russian names there are a lot of pet forms like
Katja (usually used as a short form), Katjuschka or Katrioschka (very tender and loving), Katjinka (for a child), Katka (when the child's done something wrong and the mother's angry!) or simply Ka, the modern short form.
Isn't Russian a wonderful language!!!
Lulup.s: have a look at my homepage
http://www.geocities.com/lulu_swizz/Names.html - I could need your help too!