Google Search: tafwys

saw this funny word TAFWYS
a a sig. Author: tafwys

so guess what I found AFON TAFWYS and a rather good text to teach yourself welsh with

the river AVON - we have several in UK - means
river RIVER AFON is modern welsh, or old brythonic, and place names often preserve tracves of the ancient celtic language

so the river Thames
pronounced ? *tavuis ??