|Book(s)||A Feast for Crows|
Alyn Velaryon, also known as the Oakenfist, was an admiral.
Alyn Velaryon was an admiral and took part in Daeron I Targaryen's invasion of Dorne. He commanded a fleet that broke the Planky Town and swept halfway up the Greenblood river while the main Dornish strength was engaged in the Prince's Pass.
According to semi-canon sources, he had two children with his cousin, Elaena Targaryen, Jon and Jeyne Waters.  He loved her even though he was married to another. She named their children 'waters' in honor of Alyn.