Why the 'n (yn, I assume) when one uses ti?
The "'n" at the end of my can be used with any pronoun not just ti and it is optional.
Diolch. I think it counted me off, when I wrote "Mae rhaid i ti aros," so I assumed it was some necessary part of the familiar 2d person construction.
What 'n? I see no 'n in the answer.
Why not: rhaid i TI aros?
That's fine, report it if it isn't accepted.
Tell that to Wales, they voted Leave...