In the category "Space" we currently track items of 476 persons. The most popular ones, by number of traded items, are:

Buzz AldrinJohn GlennNeil Armstrong
Jim LovellAlan ShepardGuion Bluford
Harrison SchmittRobert CrippenJames Lovell
Richard TrulyFred HaiseVance Brand
Gene KranzBill DanaTom Stafford
Pete ConradGene CernanHoot Gibson
Alan BeanDave Scott 

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