Lornaderek featured his parents, Lorna and Derek James. At the time, Nannou and Nanou2 were rumoured to be named after his then-girlfriend, who was French. The last track on SYRO is apparently named after his wife.
Honestly though, let's keep his family/relations out of this and afford the man some respect - discussing tracks obviously named after them is fair game, but as exemplified by my above dip into gossip-ville, it's a slippery slope for sure.
I can't help but be amused by the idea of his son following in his footsteps - kids are awesome and the best hope of any parent (myself included) is your children exceed your own abilities and goals by light years.
I always assumed his son was featured on multiple tracks on the Come To Daddy EP. Listening to it again this week had me wondering. If that's his kid, then he'd be around my age.