how do i make up Kilrathi names and
Kilrathi names! Good subject.
First, the simple version: The basic Kilrathi name goes {name} {modifier} {hrai}. For example, Hobbes is Ralgha nar Hhallas. Ralgha is his name, nar is the modifier and Hhallas is the hrai.
The names are entirely original words. The modifier is almost always 'nar', but several others have been seen occasionally including 'lan', 'dai', 'lak' and 'ko'. Names also occasionally have no modifier -- for example, Fireclaw has no modifier in his name (Najii Ragitagha). The exact meanings are unknown, but presumably they define how the name in question belongs to its hrai.
The hrai is the family name, and it is generally a geographical location -- a planet, a continent, an estate, etc. Ie, "Hhallas", "Ghorah Khar" and so forth. There are eight 'noble' clans, which run the empire: Kiranka, Ki'ra, Caxki, Sihkag, Qarg, Kur'u'tak, Ragitagha and Sutaghi. The Crown Prince in Wing Commander II/III is Thrakhath nar Kiranka. These eight aren't the only noble clans -- they have all sorts of distaff families and offshoots and so forth (Hhallas, for instance, was of royal breeding).
Then... the exceptions. There are several Kilrathi with three names in False Colors. One is the warlord, "Ukar dai Ragark lak Haka". Ragark seems to be his name, and Haka is his family. We're not really sure what the "Ukar" is for, then -- a second name, an additional title, something of that nature? The other are Largka and Murragh, who are "Largka Cakg dai Nokhtak" and "Murragh Cakg dai Nokhtak". They're closely related... so it's possible that the 'Cakg' is some shared first name in their family.
You can find every Kilrathi name ever mentioned in the official continuity here:
https://www.wcnews.com/articles/art17.shtml
and how do i find a system with an astirod field out of the way of were any one may have talked about in the war
The trick is that the vast vast majority of star systems are just names on a map -- you can create whatever you want in them for your story/project.