keren = קרן
Keren, in hebrew, has 3 meanings: 1. A ray (like in a ray of light) 2. A horn (of animal; musical) 3. A corner
horn = keren (קרן)
beam = keren (קרן)
Katherine is a Greek name, and has no meaning in Hebrew. People with the name Katherine usually take a Hebrew name with a similar sound, such as Keren (קרן) which means "ray of light".
Ra'ya (רעיה) means wife; beloved.
There is no exact equivalent, but you could choose a Hebrew name with a similar sound, such as Keren (קרן) or Karmit (כרמית).
There is no Hebrew equivalent of Cristal. People with this name usually choose a Hebrew name with a similar sound, such as Keren.
Karen Little is not in the Hebrew Bible. But if you are asking how to write "Karen Little" in Hebrew, it's קרן ליטל (read from right to left). The name Keren is in Job 42:14.
Keren Mor's birth name is Keren Morno.
μονόκερος [monokeros] with a unique(=μοναδικό) horn(=κέρας) < uni-corn
Keren Ann's birth name is Keren Ann Zeidel.