In the category "Space" we currently track items of 436 persons. The most popular ones, by number of traded items, are:

Buzz AldrinJohn GlennNeil Armstrong
Guion BlufordVance BrandJim Lovell
Bill DanaRobert CrippenRichard Truly
Tom StaffordDave ScottAlan Shepard
James McDivittGordon FullertonMike Melvill
Jerry CarrJames LovellAlan Bean
Ed GibsonGene Kranz 

You can find all people that we're currently tracking items for in the alphabetical index:
A    B    C    D    F    G    I    K    L    M    R    S    T    Y