[Akiyoshi]

^ That sounds actually plausible, remeber that the Huckebein keeped a low profile in order to avoid the TSAB, for whatever reason the TSAB found about them and sent Signum and others in pursuit of them. They moved for the most part outside of TSAB's jurisdiction(which also explains why they sent solo agents instead of some well-made team) and suppelmental material acknowledge their ocassional jobs as mecenaries. Security companies usually wrok on the same market as mercenaries so it's not that unlikely for Isis to know about the Huckebein family.

The "famous" militia thing probably meant to appeal to their popularity as mercenaries, we witnessed how good they're at killing so i guess they were well recommended hired-guns due to their efficience.