Westdon Martin Abay (born April 5, 1971), popularly known as Dong Abay, is a poet and a Pinoy rock musician. He was the founding member, songwriter and lead vocalist of the bands Yano, Pan, and dongabay, which are now all defunct. As of January 2008, he is pursuing a career as an independent artist.

Dong Abay es un cantante y músico filipino, de estilo genero rock. Fue vocalista de dos agrupaciones y miembro de las bandas Yano y Pan, que ahora está desintegrada. A partir de diciembre de 2005, es actualmente vocalista con su nueva banda llamada Dongabay.