Dyn ni... = we are... Slightly more formally it would be 'Rydyn ni...'.
diolch
Also different pronunciations, right?
"dyn ni" = dỳn (i.e. short) but "dyn" (man) = dŷn (i.e. long)
why ? dyn = man. ought this not to be nyni eisiau i read this as our man wants a new car