The BC Turks have official names?
[ooc] Yes and no. Some of them have now been revealed to have official names, the first being Cissnei with the overseas release of Crisis Core. Though we initially knew her name as “Shisuné” with some of the fan translations we were getting from Before Crisis, it was when Crisis Core was released that we learned the official spelling was Cissnei. The same name, spelling corrected.
Back when Before Crisis first came out, a lot of the fans assigned names to the characters, most of them popularized by the well-known and highly revered fansite for Before Crisis: Gunshot Romance. [I have recently checked and it seems the site has been frozen or taken down. I’m unaware of the reason why since I’ve been out of the fandom for a while due to real life issues, but back when Before Crisis first came out, it was practically the place for all our translations and information on BC, characters included. It was the first known location where character bios for the BC Turks were ever posted, and one of the two places I took character bios from to write out my fuller bios for the BC Turks, taking hints from the way each location described the Turks to try to analyze and garner as much about each character as I could.]
This is the full list of the fan names given to the Before Crisis Turks by Gunshot Romance’s site:
Shotgun (Female): Samantha
Martial Arts Male: Durman
Shuriken (Female): Tegwin
Now, as I said, I’ve been a bit out of the fandom for a while, so if we’ve had any new reveals on name canon, I might not be aware of them. However, I do know a few of the BC Turks have had their names confirmed canonically at this point in time thanks to the production sketches of Studio MadHouse, who produced Final Fantasy VII: Last Order, so here are those updates. (Shuriken and Katana’s names are the only known names [I believe] that are confirmed in Before Crisis’s gameplay itself.)
Martial Arts Female: Juget/Judet (Both are apparently listed as her possible name.)
Shuriken (Female): Cissnei
Insofar, no canon names have been given to Nunchucks, Knife, or Legend. They are the remaining Before Crisis Turks who have only a fan name attached to them for identification.
Hope this helps with some of your confusion on all the names these characters have.