"Or" (אור).
Variants include 'Ora', 'Orit', and names like 'Orli', which means 'my light'. These are all girls' names.
Meir for a boy or Meira for a girl also mean 'light'.
The Hebrew word for little is katan (קטן) The Greek word for little is ligos (λίγος)
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.
in the light = ba'or (באור)
If you're asking how to say "You speak a little Hebrew" in Hebrew, it's to a male: atah medaber ktsat ivrit to a female: at medaberet ktsat ivrit
"Or" (אור).
The light
"Brogan" is not a Hebrew name. Brogan is an Irish name that means "little shoe."
"amior" is not a recognizable Hebrew word, but it could be a person's name, and if so, it means "my people is light" or "my people of light"
"Kerr" has no meaning in Hebrew. Only Hebrew words have meaning in Hebrew.
Katan (קטן)
It depends on how you spell it in Hebrew: ori (אורי) = my light ori (עורי) = my skin
The name "Ruth" is a word that came directly from Hebrew with very little change. The Hebrew pronunciation is "ROOS" for Ashkenazic Hebrew speakers, and "ROOT" for Sephardic Hebrew speakers.