Dear All
I am sure that the residents of Llanwnog and Caersws will be most put out by the suggestion that they are the same place. They are most definitely separate villages about a mile or so apart - Caersws is the bigger village, through which the River Severn passes. Llanwnog is little more than a hamlet these days, though it has a lovely church, in the cemetery of which the great welsh poet, John Ceiriog Hughes is buried.
Heddwch - if you Google 'Llanwnog photographs' you will get a small selection of old photos.
Stan