Go to the county Clare Library website www.clarelibrary.ie
and select the genealogy & family history tab. Loads of information there to search for mention of your families. Also use the fantastic interactive maps they have to locate surname groups within the county across the years.
Also look for other spellings ie Murrihy for Murray. If you find anything likely, you can post on the Clare Past forum on the library site, and see if any of the very knowledgeable people on there can help in any way. Good luck!