I think all those islands belong on the page. They are definitely not Hebrides so they belgon to the Clyde I reckon. 

 As a result I've also added the islands in the Kyles of Bute and the Sanda group. 

 I think the title of the page is a little over verbose though, Islands of the Clyde would be simpler and communicate more I think.  I might change it in a while if nobody thinks otherwise.