To the best of my knowledge, the "family groupings" are not highlighted in Tracy's Kenpo, at least not in a codified way. A number of years ago, I sat down and started writing out lists of techniques that were similar, but very quickly abandoned the quest because there were too many variables of similarity. I started by grouping the initial movement, then by initial combination(where applicable). I then went went to grouping by the initial counterattaack, then by full counterattack. Then I started grouping by combination patterns, even if the strikes were different (i.e. Crossing Hammers and Flashing Daggers).
What I do now is focus on similarities in the individual private lessons based on what is being taught at the time.
I am anxious to hear Joe's comments on the groupings. Your experience in a system that codifies these things would give you a different perspective.
If you look at the Tracy's form #8, the Twin Set, Mr. Tracy has put together techniques that are similar (you do one technique strong side, followed by a "twin" weak side) but even in the form, the groupings are inconsistent (some are grouped by block (Darkness/Brushing Wind) and others by overall pattern (Crossing Hammers/Flashing Daggers).
