Doesn't Harry have any cousin hoặc relative axcept The Dursly?

no, dumbledore đã đưa ý kiến that they are his only family,otherwise he wouldn't give harry to them

We know he doesn't have any maternal relatives hoặc he'd have been sent to those instead of the Dursleys. The protection created bởi Lily's sacrifice would work with any relatives of hers. Any of James' relatives wouldn't have the same protection, and I doubt he had any, anyway, since he was an only child and both his parents had died bởi that time.

Nope only them i think.All alone.

Black