1.キャサリン (Kyasarin) - if you have mean "catherine"
2.ルーク/路加(るか) (Ruuku or ruka, if you mean St. Luke)
3.フィレンツェ (Firesoshe)
4.クイン (Kuin)
5.バイオレット (Baioretto)
6.ザビエル (Zabieru)
C is written as "シー" like in "シーディー" (shiidii), which means "CD".
In Katakana there is F, but only for Fu. Any other syllables with this letter are written alternately as "ファ" (fa), "フェ" (fe), "フィ" (fi), "フォ" (fo). You simply took フ and and small ァェィォ
There is no L in Japanese Language, but this consonant is replaced by R, so for example ラ can means "ra" or "la".
Q is simply spelled as "ク" (ku).
V is replaced by B, so for example ビ can means "bi" or "vi". V can be also spelled as "ヴ". Syllables with V letter are created in the same way as F.
X is quite random. Letter itself is read as "エックス" (ekkusu).