In the category "Space" we currently track items of 444 persons. The most popular ones, by number of traded items, are:

Buzz AldrinJohn GlennNeil Armstrong
Jim LovellGuion BlufordHarrison Schmitt
Robert CrippenAlan ShepardRichard Truly
Vance BrandBill DanaPete Conrad
James LovellTom StaffordHoot Gibson
Fred HaiseGene KranzDave Scott
James McDivittMike Melvill 

You can find all people that we're currently tracking items for in the alphabetical index:
A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    R    S    T    V    W    Y    Z