|Book(s)||A Feast for Crows (mentioned)|
Longwaters (given name unknown) was a knight of great renown and son of Ser Jon Waters, the bastard son of Princess Elaena Targaryen and Lord Alyn Velaryon. As a trueborn son, he added "Long" to his "Waters" name to show he was not himself baseborn. His line survives today in Rennifer Longwaters.
A Feast for Crows