[quote=@Sini]
<Snipped quote by Ezekiel>

How so? [url=https://awoiaf.westeros.org/index.php/Rhaegel_Targaryen]Rhaegel[/url], the mad and sickly prince, isn't born yet. Nor is the dragon [url=https://awoiaf.westeros.org/index.php/Rhaegal]Rhaegal[/url].
[/quote]

Simply mean in having a 'Valyrian' sounding name. Doesn't seem to be done for bastards until the Blackfyres.