filatelian
Filatelian is a term used to refer to a person who is a philatelist, meaning someone who collects postage stamps. Philately is a hobby that involves the study and collection of stamps, postal history, and related items. Philatelists may focus on specific countries, periods, themes, or types of stamps. The pursuit of philately can range from casual collecting of common stamps to the in-depth study of postal routes, cancellations, and the historical context of stamp issuance.
The term "filatelian" is derived from the Greek words "philos" meaning loving, and "ateleia" meaning postage.