KF4 is the build, (I believe K is the year, F is the month, and 4 is the build number) the DV portion indicates where and for what carrier (if applicable). It's some wonky code Samsung came up with. I don't know the logic behind how they picked them though.
DVKF4 is for Telstra in Australia, from what I can tell.
Edit to add: forgot to say; carrier and location are unimportant when rooting, so that's why I said any insecure KF4 kernel should work for you.