LOL I've got a large collection of picks from instrument and accessory makers - Orange, Celestion, Warwick, etc. - collected at various NAMMs, LBGSs and similar, but as far as I can see in my stash here, the only 'personal' plectrums I've got are one with Jason Scheff's website printed on, and some my ex (a guitarist) left in my collection.
I do have a couple of Basschat picks (with the old logo*) and some picks with names that are no longer around (for instance, Guitar-X, where I did my first bass 1-2-1 course, has changed name at least twice since).
* a few of you should have some too; @TheGreek had some customised ones made for me to give away at a couple of bashes and LBGSs (which I did).