This is the first I heard of any of the Clans having a variant of the PPC and I can only assume it's from their time in the Inner Sphere considering the drink started in Solaris. With the Zellbrigen Stables in Solaris hosting Warriors from the Clan OZ, plenty of time for a bartender to come up with a few new drinks.
I can only assume absinthe was chosen for the Jade Falcon for the green color, the other clans wouldn't be as easy as you would also need to avoid anything named that is also trademarked (Jagermeister and Fireball, popular mixers but also brand names)
For Clan Wolf, is vodka taken? (Thinking of that because of the Kerensky bloodname)
The Rasalhague Dominion I could see as being cut with
Akvavit due to the Scandinavian character of both the old Priniciapality and the Scandinavian descent of one of Clan Ghost Bear's founders.
Sea Fox probably Napoleon brandy (I don't think that's a trademark, IIRC, though I could be wrong) or some other high-shelf liquor or maybe champagne, due to their reputations as merchants and money-makers (for the limited sense that the Clans acknowledge money)
Ordering a Clan Wolverine PPC would probably be pure grain alcohol and a "do-it-yourself" last will and testament, as you're guaranteed to piss off any Clanner within earshot.