Did you mean Llyron? That was proven that he was only Namor's nephew because at the time Namor was canonically sterile and Llyra had slept with one of Mckenzie's descendants and then aged him up with science, unless you meant Kamar? But he was killed in the 2007 sub-mariner series. I can only recall these as his 616 offspring: fake son revealed to be nephew and then dead son. Other AU kids I don't think hold much weight unless they brought someone new in.
I personally think that Marvel is just pushing Namor cause of Aquaman, which I don't care so long as I get some good writing. Also Aaron has already messed up his characterization, he wouldn't have killed Stringray just for disagreeing with him, and teaming up with Tiger Shark, his father's Killer? I was like Nope. I already have a bad feeling about this, but I am so excited for the Defenders reunion and the new Invaders!