I have vague memories of my grandfather, Richard Evans (son of Evan Evans / Ifan Ifas) of Gwalchmai, telling stories of how tramps would frequent the farm (Pen y Bryn Uchaf).
The only name I remember was "Washi Bach", he seemed to have a special place in their hearts .... but the children, being children, were a little less kind, and were prone to play tricks on him.
This is all I remember from my grandfather. Being a youngster, I paid little notice to the stories ... something I now regret.
I will ask around the older generation of my family (who were children at the time), they may have some stories.