Kenneth is not a Hebrew word. It's a Scottish name.
Kenny has no meaning in Hebrew. Only Hebrew names have meaning in Hebrew.
No. Koppel is not a Hebrew word at all.
There is no k in Hebrew because Hebrew uses a different alphabet, but there are two Hebrew letters with the sound of k: כ and ק (and they are not interchangeable). So if you are trying to write an English word in Hebrew, it would depend on the word.
Sydney is not a Hebrew word. It has no meaning in Hebrew.
diestra has no meaning in Hebrew. This is not a Hebrew word.
the word "jae" is not a Hebrew word.
neelach is not a Hebrew word.
adera is not a Hebrew word.
"Ricca" is not a Hebrew word.
"Jay" is not a Hebrew word.
riuw is not a Hebrew word.
"peckel" is not a Hebrew word
Yaqui is not a Hebrew word.