Ooooooooooookay. Didn't realise that. I was confused as well Cassie.
That guy / kid is a Velaryon. Now I wasn't clear on this previously, but didn't they say that Targaryens are the only dragonriding Valyrians? I suppose there's already an overlap in their bloodlines so a little Targaryen is all you need (see: Jon). Anyway, this instance aside, is it a requirement to have Targaryen blood? The Sea Snake made a point his family weren't dragonriders. Or, is it more the case that the Targies just maintain a monopoly on the dragons' affection, rather than anything mystical / genetic?