User blog comment:Mizuki Raimon/What do you think they're gonna be doing 10 years later?/@comment-4173773-20110728144834/@comment-4091102-20110729100322

Some Math:

If Endous son/daughter will be born while Endous 25 and Goujous son/daughter while he is 20, there will be a diffrence of 5 years. (If they are same age)

If Endous grandchild is born while his child is 25 and Goujos grandchild is born while his child is 20. There is a diffrence of 10 years.

So in the third generation everything is possible. That's no point that hints towards one of Goujos anchesters can't be Kanons Coach.