Iphicles

As far as I'm aware, there is absolutely no mention of Iphicles (directly or implied as in "my brother/sibling" or something) in any episode of Young Hercules.

However, he is mentioned in the pilot film. That's where it's stated that Iphicles had left home some time before, possibly because of his brother's half-god status, and had left Alcmene and Hercules to manage their farm alone (and then she sends Hercules to the Academy and yadda yadda).