penblwydd hapus i chwi (happy birthday to you) as opposed to: penblwydd hapus i chi I suppose this is due to the fact that chwi is the more literary and formal of the two, and that a person on his/her birthday deserves that respect. And also (probably) that chwi is more easily pronounced than chi in the above phrase.... hwyl fawr Ian -- |----------------------------------------------|----------------------------| | external mail to: ijo@uk.ac.bton.unix | Iechyd da i bawb ar y Net | | or: ijo@uk.ac.bton.vms | o Brifysgol Brighton | |----------------------------------------------|----------------------------| Disclaimer: My opinions are mine, all mine and mine alone!