From A Wiki of Ice and Fire
|Born||In or between 171 AC and 176 AC|
The World of Ice & Fire (mentioned)|
A Feast for Crows (mentioned)
Jon Waters was the bastard son of the seafarer Lord Alyn Velaryon, called "the Oakenfist", and Princess Elaena Targaryen. He had a twin sister, Jeyne Waters. Elaena had hoped to marry Alyn, but he was lost at sea.