Abel DufraneAbel IngpenAchille DeyrolleAdolf HorionAdolph ModéerAdolph SpeyerAleksei Konstantinovich ZagulyaevAlessandro TrotterAlexander Barrett KlotsAlexander HeyneAlexander Ivanovich YakovlevAlexander John NicholsonAlexander Julius ReichertAlexander Kirilow DrenowskiAlexander Yersin (entomologist)Alexandre Louis Lefèbvre de CérisyAlfred BalachowskyAlfredo AndreiniAlois Friedrich RogenhoferAndrey Vasilyevich MartynovAndré Léon TonnoirAndré PaillotAndré PeyriérasAntoine Henri GrouvelleAntoine Joseph Jean SolierAnton AussererAnton Heinrich Hermann FasslArnold Lucien Montandon